The idea that it is possible to "diplomacy" your way out of conflict with a dictator is so absurd I want to laugh my ass off, but unfortunately it isn't funny at all.
Putin will happily send every last Russian in to the meat grinder before he accept defeat, and now that he has his American buddy back in place, now with added musk funds, it is seriously delusional to think the situation is going to do anything other than escalate.
Zelenskyy is being beyond naive at best (I honestly don't believe he believes in what he's saying).