Nah. It was very clearly an opinion. Saying something aucks us as much an opinion as "it was great". It is clearly subjective. Saying it bombed or was a success is factually right or factually wrong. Clearly a difference.
Should 99% of posts on this forum be marked as opinion at the start?
Afterall, someone Saying npc x us great or bad is clearly seen as opinion based. So should one's statement about a movie.
In my experience, a *lot* of people (especially in online forums) tend to believe their opinions represent objective facts, and state them as such.
So when mixing opinions with factual statements in a post and no indication what is supposed to be "just an opinion", it shouldn't come as a surprise when the whole post is being read as a factual statement.
That's why I'd indeed favor marking opinions as such (can for example be as easy as saying "*I think* it's an insult to all D&D players") which immediately takes away the vibe of you making a statement on behalf of all D&D players when you in fact mean to say it's an insult to *yourself* as D&D player.
Overall it helps a great deal hopefully focusing the discussion on why you feel that way, and not debate the truth of a claim you didn't even try to make.
Just a suggestion to save time + energy. Leaving this thread alone now.