Google bad ux.
And you'll get your results in Comic Sans.
Try it

Google bad ux.
And you'll get your results in Comic Sans.
Try it

I like comic sans
i kinda like this...
Funny! Not entirely fair, though. Comic Sans is usually legible, unless you put it on a ridiculous background.
The most common bad user experience is inflicted by the numerous websites following an incompetent design fad: using low-contrast grey lettering on stark white, apparently on the theory that it looks sophisticated. The badness is exacerbated if the website is perpetrated in a thin-stroked font whose stroke width doesn't increase with the font-size -- an abomination like Raleway. Body text on such sites ranges from the painful to the wholly unreadable.
There were formerly occasions when I wanted to read a particular site badly enough to rewrite its horrible stylesheet, but I've run out of patience and now just abandon such.