Europe has been attempting to negotiate with Putin before Trump ever entered the picture.
And the negotiations between Trump and Putin are just theatrics, nothing more.
Your proposal seems like a reasonable starting point on the face of it. But is unrealistic for several reasons.
The UK and France don't have the political capital to threaten war on Russia. RN and Reform would likely dramatically surge in popularity.
Also Putin is obsessed with Novorossyia at a minimum and would interpret the threats of entry into the war as a bluff and try and call it.
And there are a lot of boomers still in charge who can't accept that the Europe-US alliance has become transactional and thus unreliable.
there is no such shift
it's not "you disgust me" -> "I wanted a normal family"
it's "I wanted a normal family and you disgust me"