Its a favorite conspiracy theory of some intellectuals like Chomsky, Jeffrey Sachs, etc.
The theory goes Ukraine was all set to make a peace deal in April 2022, but Boris Johnson / Anthony Blinken visited Ukraine and basically told Zelensky he had to keep fighting.
Lex Fridman is the odd peaceniks who leans more on the right - he's not overally politcal he has been a Musk fan boy in the past and seems to admire those on the political right alot more so than anyone on the left. But he's been pushing "peace, peace" on his channel for some time - recently had an interview with Zelensky.