In Noah Bradley's case, a lot of people just disliked him because of a reputation that he was a self-important jerk who jumped on every opportunity he could to self-promote and had some annoyingly devoted fanboys (a similar dynamic follows Elon Musk).

When the cancellation was in full swing I got the distinct impression that a lot of people were piling on to settle scores or because they just hated seeing him and his fanboys spamming up his stuff all the time, regardless of whether they actually knew him to be a creep or not.