There are billions of cows, chickens, etc. in the world. Purely by numbers, those species are incredibly successful. Yet, If not for humans finding them tasty and easy to manage, we would not have bred them to this degree and they wouldn't have reached this degree of success. Somehow, against all odds, being tasty/something we want to eat has somehow become an incredibly valuable and successful adaptation.
Evolution is absolutely wild, and this really drives home the fact that evolution isn't about the individual's likelihood of survival, but their likelihood of reproduction.
Depends on how you define success. If you look purely at population numbers, yes. However, if you look at how they live in industrial animal mass production facilities, no.
Evolution doesn't really care about quality of life, so long as an organism still reproduces. If every organism in a species is in horrendous, absolutely unconscionable pain and suffering for their entire existence but always manages to successfully pass on their genes, then the species can absolutely be deemed "successful". In a way, we have a symbiotic relationship with e.g. cows: even if we cause them mass suffering as individuals, as a species our relationship is mutually beneficial and that's all evolution really cares about at the end of the day.