UK's then prime minister Boris Johnson and US Secretary of State Antony Blinken play a dirty role in this. My guess is on behalf of their MIC industries for whom the current tap wide open weapons flow is a big bonanza.

Blinken is now pressing Zelensky to give at least a semblance of interest in peace because he realizes that support for Ukraine is waning among many countries.

https://scheerpost.com/2022/11/01/the-west-must-stop-blocking-negotiations-between-ukraine-and-russia/