Gen 5 imo has the worse designs. Gen 5 felt weird. and yes there are good gen 5 pokemon. that is not being contested. but i feel like gen 1 has stood the test of time, and even if part of that reason is the fact it was first, they're all iconic. so iconic, that gen 5 literally tries to mirror some of them ( Woobat -> Zubat, Geodude -> Gigalith line, rattata -> patrat, amongst many others) gen 5 had a bunch of awesome pokemon, but it by and far, had the worst of the bunch as well to me.
no, i do like the idea of garbodor and vanilluxe, i think they're good actually, we are pocket monsters afterall, but the elemental monkeys are just kind of uninspired as well as marking the first generation where i was either indifferent or didn't like any of the starters at all. obviously, even that grew on me over time, but i do think it's telling how much of the community disliked them during their time as opposed to XY, which i think while not having nearly as many pokemon, definitely had alot higher quality pokemon.