It looks like he has had 3 threads over the season. One in August and two in October. Now one in the offseason. Not enough to consider him a troll in my book. You can consider him whatever you'd like. I don't recall him popping up in every thread crapping on Richardson constantly or making a thread every week.
In my opinion, it isn't frequent enough or over the top enough. Your mileage seems to vary. That's fine.
The post actually did spark some genuine discourse from a hand full of posters. It's just an unpopular opinion, so not many are willng to engage in that sort of discourse.
The guy has been a member of the forum since 2013. He didn't just create an account when Richardson was drafted to crap on him.