We've been playing regularly for 4 years almost every week. We had quite a large group of people interested in playing on the regular who rotated in and out and most of the time we had no problem getting 4 to start a pod.
A while ago a guy who recently started playing with us suggested PDH as a variant. PDH stands for Pauper EDH, which is a format where the commander has to be an uncommon creature (doesn't have to be a legendary) and 99 of common cards (well, cards that were printed as common at any point in time). That person also suggested an another limitation, which was to build decks from either the cards we already have or have traded between ourselves (so no buying cards from TCG Player or anything similar). I was right on board because this was an interesting challenge as well as an opportunity to actually engage in the "trading" part of trading card games. The highlight for me was giving away a copy of each duplicate common I had (over 200 cards) to a friend who was starting out the journey and see him actually use these cards in the games. I had a lot of fun... but not everyone enjoyed it.
One guy absolutely HATED the format. That guy loves big flashy plays. You can't really do big flashy plays without all the rares and mythics. At the same time he kinda didn't want to miss the play sessions, so he was showing up but his heart wasn't really in the game. He likened the format to "trying to kill each other with plastic knives". I can sort of understand him because regular EDH is still fun and I also had a new deck I was eager to test out.
Yet - instead of clearly communicating that he would like to play regular EDH - he decided to do something completely autistic: he netdecked a cPDH deck (competitive Pauper EDH). This is an equivalent of bringing a cEDH deck to a regular EDH table. In order to do that not only he broke the "taboo" of not buying cards, he went so tryhard that he even proxied the snow lands that were required to enable some sort of an infinite combo. I have no idea why he did this and what he hoped to achieve because this is completely out of character for him.
Needless to say, this really pissed off the guy who proposed to play PDH. They had an argument and the end result was that the PDH guy declared that he only plays PDH from now on and the tryhard guy declaring that he plays EDH only. It didn't seem like a big deal at the time, but extremes like these often convince fence sitters to jump down. So soon after it wasn't two guys, it was four guys who disagreed about what format should be played and refused to play both. But hey, there's a lot of us, this still doesn't prevent us from starting a pod right?
Enter the FLAKES. We had two other guys who started regularly flaking out on almost every game. The first guy had a bunch of health issues. The second guy seems to constantly have something going on at either work or in a family. All of these are valid reasons for cancelling and no one gave them shit for it... except every single one of these fuckers would also use these excuses when they were simply too lazy to show up. One dude cancelled six weeks in a row. Each of them would cancel not even the night before but at the very same day we were supposed to play.
On top of that there was a new brand of fuckery in which some people were declaring that they would come play but only if we're missing the 4th to start a pod. This lead to an issue in which we would have five people willing to play, one would say "I see you have four players so I am checking out, have fun" and then one of the flakes would say they're not coming either. Now if you want to play you need to go through the humiliation ritual of begging the first guy who left to come back. I did that a bunch of times then stopped because it felt like raising children except in this case the child is 30+ years old. Utterly ridiculous.
Needless to say, scheduling was a nightmare in this setup. We got 4 people to play this week? Nope, flakeout #1 can't make it today. Okay, next week, 4 people? Nah, one wants PDH and the other one wants EDH so we don't get to play at all. Next week, 5 people? Both flakeouts declare they won't make it. Mind you, this is all after finding the supposedly perfect day that works for everyone, so it's not like we can push this to a next day or something.
This went on for a while until people started losing their shit (myself included) because there's only so many times you can schedule a game only to find out it's cancelled three hours before it's supposed to happen. We actually had one more new friend join at that time and he bailed immediately after seeing what we had become. All of this made one other dude reconsider his love for the game and he had since stopped playing completely. The aftermath of this is that we hadn't had a game in months, half of the people we played with left our group chat due to constant arguments and whenever someone asks to play I am pretty much the only guy who still gives a shit. Even though I care I simply do not have it in me currently to mend multiple issues between multiple people, I have enough on my plate without this kind of drama.
You might also think that the PDH guy was based for limiting us only to the cards in our collection and trades between friends. Well, at one point he revealed that he has a friend that buys several boxes of each release, has been doing this for years and that this friend has an absurd amount of cards he doesn't use. So he had access to every common under the sun, which makes it no different from buying cards but still gave us shit whenever someone suggested something as simple as lifting this rule for commanders only. This in turn encouraged other people to break the rules as well. He also got super mad about me recurring Spore Frog from the graveyard since it was too "tryhard" for him LOL