GTA 4 is better on Xbox 360 since that was the console it was built on, before being ported to PS3. Since both GTAV versions were built in unison, R* were able to take advantage of the PS3's specs and that's why GTAV's better on PS3 and all their marketing material was from PS3 version.
OP: You seem to have something against GTA. I'm a huge GTA fan, but I really don't see anything wrong with the series. It's very fun, and IMO the best open-world series currently out there.