Proof of Stake Consensus Protocls - How to Do Trustless Transactions?

i find odd about crypto in general is thatike, the problem that they're trying to solve is the problem of, like, how do you do trustless transactions? Like, two parties don't trust each other? And how how do they actually get to that consensus? And what happens if, like, one validator in a transaction rejects a block? Consensus really is at the core of of these technologies. These systems are meant to be trustless. It's meant to a cut out the middlemen, like you said. For proof of work consensus protocols, that trustless interaction between miners validating nd and earning rewards from block production,. is much simpler than proof of stake