Mastodon is going through something right now. Sorry you are a focus. An increase in this type of behavior has been reported from a wide cross section of popular posters over the last few days. It seems to be a combination of deliberate trolling to sow dissent and demoralization, and genuinely frustrated but naive posters energized by the provocateurs. Cleaning up your feed by blocking these doom-sayers seems to be the best strategy for both the posters and followers.