This game will fuck you up. If you don't immediately know what you're doing or decide to lower the difficulty after starting the game, it's GG.
If Dark Souls is a steep climb, then this is just a straight-up brickwall to XCOM or TBS-games. Into the Breach is more fun imo.

Maybe I'll play it again someday with weeny mods that disable turn limits and the ticking clock of the Advent project