I think y'all are giving people too much credit. Nobody is sitting there calculating the pros and cons of different ideologies, they'd rather suffer themselves than watch anyone else succeed, so they go for reactionary politics full of bluster that entrench the status quo to satiate the desire for the current situation to maintain, because real change is scary and they are very, very stupid.
It takes an effort to be critical, to actually understand things, and to imagine a better world, but people are lazy, they are weak, and the instant gratification is bitching and moaning, shifting blame, and justifying their current existence with the falsehood of its inevitability.
None of this has anything to do with whether people believe Corbyn or any politician. It's purely affective, reactionary bitterness. It's not trust in politicians we need, but trust in each other. We live in vapid cultures with no grounding in meaningful traditions, with no common goals, and no spiritual foundation. We're cut adrift in an ethically bankrupt marketplace, which is the only reference for society to determine value in anything at all.
We're doomed.
