I suspect that all you're concerned about is preventing your precious tax dollars going towards Ukraine's defense.
If Zelensky had signed the deal yesterday, what would prevent Putin from continuing the war or re-invading Ukraine on some trumped-up (pardon the pun) pretext six months from now?
Exactly.
If we just give the Sudetenland to Hitler, then we'll have peace, and he will stop any further aggression.
People who don't learn from history are doomed to repeat it.