I mean, I feel like even the jump between 4 and 5 wasn’t that massive. San Andreas to 4 went from chunky polygons to rather realistic graphics. GTA 5 feels almost like a HD remaster in comparison.
But of course, there may be a difference in expectation, since there were five years between 4 and 5, and currently scheduled to be twelve years between 5 and 6.
5 feels worse in the ways that matter. The physics in 4 was so fun and dynamic, and in 5 they feel like they’re aiming for realism.
To me, they removed the part of the game that makes it being open world fun.
I wasn’t really expecting 6 to be anything but GTA5 with different characters.