I have to fight you on FF12/DMC4. :P
DMC4 wasn't terrible. But, it just didn't feel like any real jump over DMC3, which is one of my favorites. I also found the story completely non-engaging, and playing through the game twice was meh. I had some of the same complaints about DMCV too.
I tried FFXII twice and both times got like 20-30 hours in before losing interest. Just too long and repetitive to go anywhere. I think the sand sea or whatever is what broke me both times. I believe they made some adjustments for Zodiac age, so I may give the game a third try when it comes to gamepass.