Toe Fungi are more likable then black jesus lady. You have to dip into ST

icard to get equally unlikable characters. Even Neelix is more likable then any characters from Nu-Trek. That's how bad Nu-Trek writes itself. Neeeeelix is a more likable character. Let that sink in.
Still, I don't enjoy Lower Decks but that's probably because I'm not the audience its aimed for anyway.
I've also watched the show, and my two cents on it are...it's not bad. Not great, but not bad.
I will full on admit that the first two episodes are garbage and everything you said applies to those episode, Hell, I almost dropped the show then and their, but I'm a glutton for punishment and a friend of mine assured me it gets better, so I decided to continue on and...yeah, he was kinda right. Upon the climax of episode 3 the show starts to dial back on Mariner being POC Space Jesus and actually bothers to give her a few flaws. There's even a few times in Season 2 where she needs to be rescued by "pasty white boy" Beckett and Jack Ransom "the white dude-bro commander" because they end up in situation where the only way out is with diplomacy, which Mariner turns out to kind of suck at. I will admit I didn't start actually liking Mariner until Season 2 when they actually started exploring her flaws a bit more, but she did generally get more tolerable throughout the first season...albeit with a few relapses here and there.
Now, maybe it was because the show set my expectations extremely low, but seeing a strong, independent black women needing the help of a white man to get out of trouble in the year of our lord that is "Current Year" warmed me up to the show quite a bit. I will also give the show credit for having the Senior Staff characters being fleshed out, having personalities, and actually be deserving of there jobs and not just being the "token assholes in charge who steal all the credit from the lower deck characters, who are the real heroes" that I thought the show would make them be.
Of course, I'm not going to avoid pointing out it's flaws. While I wouldn't say calling Lower Decks "Rick and Morty meets Star Trek" the perfect way to describe the show, it also not an entirely wrong assessment. It also sometimes it channels a bit of "Reddit humor", with the jokes being hit and miss, but even the bad jokes have the decency to be over fairly quickly. The show also has a bit of an identity crisis at to what it wants to be, sometimes it wants to be a Star Trek parody with slight Rick and Morty vibes, sometimes its tone is legitimately straight up genuine Star Trek played completely straight. Much like the humor, sometimes it works and actually flows well enough to make for a good scene, sometimes it causes a bit of a mood-whiplash for me. That said, I feel like the show is trying, it doesn't always work out, but at least the show is putting effort into doing it's own thing to be appealing to new people and not piss off the fans. It's sad that's considered praise now a days...but there ya go.
tl:dr: On average, it's a 5 or 6/10 show for me. I do not blame you if you dropped the show after the first two episodes, because those were no-stop garbage, but the show does start steady improving from there on and puts the reigns on Mariner being black space Jesus. I can understand if it doesn't gell with you due to being a bit different in tone from classic Star Trek, but if you don't mind taking a step back and accepting the show for what it is, it's at least...something mildly entertain to watch while you eat dinner or something.
I might just have shit tastes though, I never rule out that possibility on principal.