Trump won't be good for Putin. This is one of my favorite videos. https://youtu.be/jo-Jiil1Ues?si=q_LAH4NF4fE3NiVN There are others. Trump literally pulls Putin towards him like a rag doll. When Trump compliments Putin he isn't saying I'll let Putin do what he wants. He's saying "Putin is very strong, but I am stronger."
I'll do a story about this soon. The reason the Republicans aren't helping Ukraine is Biden won't give them an once of credit for it. He uses Ukraine to tar the Republicans as pro Putin Trumpers, etc. So why would they help?
If Trump did get elected (I doubt he will) his administration would take over the war in their name. It's U.S. domestic politics that prevents the U.S. from fully getting behind Ukraine.