Yeah, its a shit show as expected. Some of the win rates are absolutely meaningless due to being so under-represented but outside of ATC you're also going to get screwy results from shit like
"Oh, I got my ass kicked as a space wolves player and gave up early in 10th edition, now with a new edition it's my time to shine!" is a player archetype that'll be out there grinding GTs for a few weeks until they continue to lose, give up, and quit again having learned nothing. There was also similar shit with necrons at the start of 10th where people lost their minds with c'tan as if they were unkillable boogiemen that no one could do anything about, until they realized cheap mass 1 damage fire that they couldn't reduce to 0 was the way to kill them.
"the meta" just isn't worth caring about unless you're already within the top couple percent of players at this point.
If you think about it, he's the god of blood and skulls, but not the god of industrial or building collapse accidents. Berserker raging retards like the world eaters give him a bad rap. He doesn't really care how the blood flows, but he'd prefer it if it were in honorable combat. It kinda makes sense.