1. The complaints about beta I felt were misplaced. They shouldn't have made the beta default for anyone (and perhaps they should have refined it just a little more first...) but I think Slashdotters seriously overreacted to what was an easy to opt-out of test of a new UI. (And frankly, with D1 broken - thanks Pudge - and D2 horrible, I was looking forward to someone doing something about the /. UI.)
2. I'm pretty sure that if they'd covered GamerGate in depth, you'd - based upon what you've written here - been so unhappy you'd never have come back.
3. I go the other way - there was a failure to ensure discussions wouldn't be derailed by trolls and anti-diversity fanatics, especially in the aftermath of a somewhat extreme anti-diversity campaign in one corner of tech. Slashdot's articles were of interest to some of us, unfortunately the massive wave of abusive moderation and anti-diversity crapflooders meant we couldn't have an adult discussion about the issues.
Where we agree however is that, much as I'm reluctant to attack anyone by name, the types of articles that were posted by Haselton were never right for Slashdot.
Haselton wasn't even the first time they did this. Real Slashdotters remember a guy called Jon Katz who Malda brought in largely to introduce original commentary - just like Haselton. It was a disaster. Slashdotters became increasingly annoyed by the posts, just as with Haselton.
Why did Slashdot do it again? No idea. I'm guessing they thought it might be worth a try again, perhaps thinking it was Katz, not this kind of commentary, people disliked.
As an aside, when I used to blog more actively, people (nobody working for Slashdot I might add) asked me if I should offer to write similar pieces for Slashdot et al. Leaving aside my appalling writing skills, this is why...