To be precise, P0 is accused of focusing on finding bugs in competing products. This is a bug they were told about, not from original research.
But writing up an exploit that was basically handed to them is pretty weak evidence against the angry narrative.
https://bugs.chromium.org/p/project-zero/issues/list?q=Produ...
You can dispute their intentions, but I'm not all that interested in debating those. What you can't do is debate the effect, which is positive.
This is the same general point that the original comment you had replied to was making which itself was an explanation of why people are distrustful of P0 even if the brass tax is positive for the end user. It's fine if you don't find that political side of it interesting but it's not as simple as just being a donation.