I am halfway through the game, I think. I like that the game is a linear story and not a roguelike, but I find the power curve is really lacking. Even after upgrading cards to max level, I still feel really weak against more enemies than my max party of 3. The lack of mobility, the small chances of synergies working, and lack of damage compared to the enemy make battles longer and longer as time goes.
The game giving unlimited revives is the only way to get through some battles when you don't have a fully healed party at the start of battles. Oh yeah, you rely on health boxes between battles, but they don't fully heal you (5 health, 20 health).
The art and story was interesting, but the farther I get into the game, the less I want to play it, as each battle takes longer and longer.

Third time stuck on loading screen after first boss fight, unable to continue.

Short, Sweet, and Solid game. There aren't a lot of deckbuilders that aren't roguelikes, so if that is what you want (It is what I really want) then this isn't a bad choice. I would make a couple of quality of life changes, but overall I think it is pretty fun. I ended up liking the characters, but wish they could have explained some stuff better. The combination of thinking about where to place characters and deckbuilding is pretty fun. I wish they made it heal after every battle, because realistically it is just a chore sometimes to not have that. Also, when I finished the game, I had a FTK deck. I hope they don't nerf it because it was pretty fun lol.