Every leader throughout history has had to put up with the discontent of the governed. Being thick-skinned and ignoring the barbs is part of the job.

Social media is a red herring here; this sort of thing has happened on all forms of social media since the dawn of computing. It used to be on mailing lists and Usenet. Now it's primarily on Twitter.

After 30 years of leading a project, anyone is going to get worn down.