>>713732449 (OP)They are hard mainly because of how badly unpolished and fundamentally broken they are. If you give them GTA 4 or 5 controls and fix bugs, they become fairly easy, like how it with Vice City Next Gen fan remake.
Back in 2000s, it was piss poor easy to make games because Renderware was a simple platform, which meant easy money, so Rockstar churned games out like it was nothing without any focus on quality control. The results obviously shows as at least half of their games aged shit. Unfortunately contrarians and edgy kids will simply ignore this and scream "skill issue" or call you a faggot, since GTA fanbase is full of knuckledraggers.