I hesitate whether to report those threads because there is no point in keeping them without the OP. If the moderation understands that they are useful the OPs could be restored and the threads locked.
What is clear to me is that having a big ego does not help in general in life and in the forum we have seen other cases that usually do not end well. Some quite intelligent people with big ego we could cite nullius for example although there are several more similar cases that did not end well.
I'm not sure how the campaign managers will look at this behaviour, I believe that the opening of a large number of "useful" topics is one of the reasons why he is accepted in higher-quality paid campaigns.
Well, if it's just a few it's not the same as the tantrum being such that it leads to a mass deletion of OPs.