I don't know why, but every digimon game I've played has a massive fuck you to the player.
Digimon world 1 had decent monster raising, but it is slow and your monster dies after a while leaving you to raise it again from a worse position than you started from.
Digiimon world 2 had decent dungeon crawling, interesting digimon recruitment, and the digibeetle was a fun concept but had its back broken by dna evolution and constant level resetting.
Digimon world 3 I cannot think of a good thing to say about and had its problems with lack of an experience bar, backtracking, and the ever present grind.
The ds games had lots of digimon to get and different ways to customize them and the farm system was a wonderful addition and in my opinion the best part of the game, but the grind needed to get them felt like something out of a f2p mobile title. Further story games had these same issues except for the xros wars games. Those had an easy way to get digimon but the same jogress issue as digimon world 2.
Re: digitize is in the same boat as digimon world, except that I spent more time in the gym than in DW and it felt even more dull despite the introduction of tits.