I honestly can't admit that. I don't think he's put a whole lot of time or effort into his YouTube uploads. The timing is pretty sloppy and he's typesetting with Comic MS Sans, for pity's sake. He's clearly just doing it because he wants more stuff up on his channel, and he ran out of the Hurri and Aba eps other groups have done. If a completed sub of Hurri or Aba somehow materialized tomorrow, I'm sure he'd just upload eps of that instead of continuing his own work.
1) I don't see how anyone is mocking him? People have said, "Hey, this thing that looks like an HK clean-up is probably an HK clean-up. And if it's not an HK clean-up, the quality isn't any better than you'd expect of an HK or guess sub."
2) Why is the fansub community obligated to help this dude? People who are interested in subbing Hurri and Aba are already doing it themselves. They're doing it a bit slowly, for various reasons, but... y'know, what if they don't wanna work with YouTube guy?
3) For that matter, what if YouTube guy isn't interested in going back and redoing stuff he's already uploaded? If he decides he's okay with these releases, then any attempt to "fix" them would be futile.
4) These releases are probably beyond fixing. Once a translation is at a certain level of... being compromised, let's say, it actually takes longer to have a TL correct it than it would for that TL to produce an original translation of the same episode. And that circles back to the "people who want to do Aba and Hurri are already doing it" issue.