I’m far removed from the situation, so my opinion isn’t worth much on this part, but I think realistically maybe there could be some concessions around Crimea for a peace deal

If your opinion isnt worth shit dont share it, the notion that Russia will give up any territory, never mind territory it held before the invasion is counter to the reality where the entire ukraine front is currently collapsing and Zelensky isnt even being considered in peace talks because he has no position of strength due to insane losses.