Grand Theft Auto IV got universal critical acclaim and a 98% Metacritic score. But not too long after, and especially as we look years later, a lot of people were disappointed by it, and a lot of fans outright didn't like it. Of course, now we're free to criticize it as much as we want, but AT THE TIME, it really was a total boss.
Grand Theft Auto V garnered just as much sales and hype as GTA IV. Right now it's top dog, but 4 years later are we going to look and say "Wow 97%, this is overrated". Part of it has to due with the nature of GTA games becoming obsolete due to increased realism in games.
But possible things people will be saying about GTA V years from now:
- The graphics are dated (I'd argue that they are dated even now)
- Story wasn't all that impressive; it was tough for Rockstar to juggle three protagonists
- Los Santos was rather oversized, and a denser city with more interiors could have helped.
- The game is still almost entirely, drive to point A, shoot enemies, drive to point B. (No trip skips)
- Some of the heists had little actual choice or planning, and the heists you could plan had very few and straightforward options (the expensive guy thats good or the cheap guy that sucks).
- The cop-chasing and pedestrian harassing mechanisms really hasn't changed meaningfully
- It made no real revolutionary changes (4 had amazingly realistic graphics for its time and San Andreas had a giant world for it's time). Refinements yes, no fundamental changes. GTA V feels as derivative as it's always been. Three character structure is nice, but doesn't fundamentally change the game.
It's still an amazing game. At least for now, so enjoy it.