There's a reason I've avoided After Hours for the last 8 years... Seems to me like the OP should consider stepping back from it a bit.
I don't doubt AH's popularity and potential fun but I have no doubt in my mind that, me being such a sensitive morsel who is easily angered/upset, I see no reason to go there, not even to read, even if that does mean I'm missing out on whatever nuggets of actual awesome it does produce.
That is of no disrespect to AH or it's dedicated followers, Mods or anything for that matter - Just a conflict of preference, style and view on my part - And my decision that it's probably best for them and myself (moreso myself, obviously, like I'd matter to them

) to just steer clear if I do not like it.
Someone else has already said it perfectly - Boards is far too massive to paint with such a paintbrush based on ones experiences within a particular Forum. I've been here for donkeys years have enjoyed every year equally by simply avoiding the Forums I dislike and sticking to the ones I do. With so much of your total posts being in AH and your dislike of supposed childishness, why not simply enjoy the more serious Forums that relate to your interests rather than shunning an entire website over (what we can only assume is) one Forum.