I agree, ruthless criticism is the way for game writing to move forward. Now let me show you who is the best person doing that now. This dude, Bryce Lynch of the Ten Foot Pole blog.
He is insanely prolific doing reviews. He will read a whole One Page Dungeon Contest and comment on each and every entry. His comments on my entries have not been positive but they have helped me step up my game. He will gladly say something is crap and exactly why he thinks that.
BUT his "darwinism" only extends to games, not people. He doesn't play in the controversy olympics. He reviews modules as modules. He pans Isle of the Unknown but does not say "Look at this lackluster production from the notorious child-rape advocate." At times he outright separates his opinion of the product from that of the person. "C'mon, you can do better, I know you can."
Of course, most of the people he reviews are obscure Dungeon magazine scribes and one-shot module writers, but the way he also treats the micro-celebrities on his list makes you sure that he really is coming from a place of love for the hobby. It makes his criticism of the games more effective.
There is a third way, between dick-jousting and fluffy hugs. Follow the ten foot pole.