just consider those examples as bad games. I didn't say every game with grind is fun or intends it as such but it's supposed to be doing that, it can fail at it or not even try but that's just an example of the design missing the mark somewhere.
Crysis 2 is not a bad game I know you're not implying that). You just mentioned that if the grind is not fun then it's not the games fault, and it's most likely the person. You really just contradicted yourself just now. Yes, there are some games that know how to do grind well and actually make it fun, but most games don't. They either do it average or even worse. One or two examples doesn't make up for a lot of games that do it horribly or worse. I'm glad you like Darkest Dungeon, the most people find the grind good, but that's only a few examples. Even in good games, there can be bad grind or grind that is not done well.