David Sacks is a SV venture capitalist who argues that Ukraine should sign a peace deal with Russia rather than fighting back the invasion.

He tends to follow a bit of a pro Russia narrative and annoy others including here the Ukrainian journalist Ponomarenko, who Paul Graham backs up.

Here's a write up on Sacks and some of the issues https://vatniksoup.com/en/soups/144/

A bit of a problem with Sacks is he's not very informed on the history of the situation. I heard him on a podcast that he first heard about Ukraine in like Jan 2022 but proceeds to propagandize his position noisily over people who have lived there for decades.