Prometheus is my favorite of the three. I really loved that film and was quite impressed by the quality when I first saw it in theaters. Of the three it's also the only one I own on DVD. TDKR would come next followed by Star Trek.
This is "horseshit." If he's been watching Trek in all its incarnations for decades then he has a perfectly valid opinion of what it is. And if he has similar tastes to others who often reflect his opinions then he's got nothing to apologize for.
I'm pretty sure he meant the poster's opinion on Star Trek the movie is worthless since he hasn't actually seen it, not his opinion on Star Trek as a whole.