At the end of the day, Putin invaded. Did Nato provoke to an extent, yes. So if you really want peace start with Russia withdrawing. Then place major stopgaps on Ukraine w/ Natio. Prohibit their trade and find a way to track investment. If peace really is your goal, start with the withdrawal of invading troops. Then put some major EU sanction type restrictions on Ukraine. But you can’t expect them to give up land.