The GrapheneOS obsession with picking a fight with everyone else is the most unfortunate part of the project.
It doesn't seem to be the entire project, just one dev (afaik) that's quite outspoken and does make accusations that they don't always seem to back with evidence. Also insofar as the actual "product" remains completely untouched by any spats it shouldn't be a dealbreaker for anyone wanting to use GOS, but of course it isn't ideal to have any drama attached.
He never shows any evidence. Always accusing without any images/links. I love the project but it looks not normal.