Thanks for the screenshot, the sample just shows as browser-default fonts for me with Iceweasel.

Both of these have the horrible rainbow effects around the edges of the letters, presumably from sub-pixel anti-aliasing.

But I'm an outlier, basically the only way I can read text without serious eyestrain is aliased with good hinting. Somehow the "jaggies" which so distress most people are completely innocuous for me, while I can't tolerate any of the fuzzy/blurry look that most readers bizarrely call "sharp".