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What is this crap of which you speak, OP?
Nobody hates gen V, it might not be everyone's favourite Gen but it is up there with the best (and I include gen III in with the best).
The worst gen was Gen IV because the entirety of D/P/Pt was a massive cave where you only encountered Zubats, geodude and Machop. Some gyms were placed just outside the cave as an afterthought and one or 2 small patches of grass just in case some players might want to see or catch something other than a fucking Zubat.
As to Gen IVs plot, forget it. It was basically Cynthia turning up saying "there are legendary pokemon, guys." and Cyris and his extremely forgettable henchmen going "I will destroy the world for no apparent reason other than being a dick." and then getting easily stopped by a kid who didn't even have all the gym badges at that point and probably had a team of 6 Zubats.
Gen III made people fall in love with pokemon again after the lacklustre Gen II but Gen IV squandered that with Zubat Cave: The Game. Had it not been for Gen IV returning to the Gen III formula of great new mons, decent plots and lots of exciting, fun and diverse areas to explore then the franchise might have gone down the tubes. It didn't quite recreate the diversity of Hoenn but it did a much better job than Gen IV did and perhaps better then XY did as well.