After seeing this thread I remembered I had the first game installed on steam deck and decided to give it a try.
I sank about 20 hours into it over the last 2-3 days and reached the same conclusion as every other rogue lite game I've played - these games are 90% RNG and 10% autism and I just don't have the tism needed to mathematically map out every aspect of the game to increase my odds of success from 5% to 35%.
I spent time learning the cards and trying various builds but no matter what I did I got ganked either midway through act 3 or on the act 3 boss. Then one run I got the sneko eye and some book that let me shove a random card in my draw pile every turn, a couple of high damage and high block cards and I went full YOLO. Not only did I beat the act 3 boss (the toughest one for me, the time lord or whatever) but it wasn't even close, he never got me below like 75% health. Its all fucking RNG.
I think the fun is mostly the slot machine effect and your monkey brain getting a dopamine hit from every new shiny card, relic or potion.