I think in this case it's meant to mean "project management and task tracking tools are basically always hateful, but I find this one the least hateful".

I once, over a beer, told the development team of a ticketing system that I'd never used anything I hated less than theirs, and they all grinned and said that that was high praise to them.

If you believe you can produce such a system that people actually like to use, rather than finding less hateful than the alternatives, I genuinely invite you to try, because I'd love to have such a thing available to me. But I'm afraid I'll remain skeptical until I see it :)