As a whole I don't like anti-aliasing because it just blurs everything too much. I'd rather take crisper visuals (even if the pixels show a lot more) any day, especially given how much it impacts performance.
Then again, I know nothing about the technical stuff, so quickly glancing at the OP maybe the anti-aliasing that bothers me is FXAA and there are better kinds.
That depends on the solution. MSAA and SMAA are good at keeping blurring at bay (though the former is terrible for foliage and the latter isn't as effective at curbing other geometrical jaggies as FXAA nor TAA/TXAA are). Really, in this age of higher resolutions/Resolution Scale, I much prefer SS.