I looooove patterns that are *marketed* as ugly -- i.e., fair isle, often marketed as "ugly Christmas sweaters." (I guess that's a "Yes" vote for your question about whether ugly patterns are a trend right now.)
But I do not find fair isles ugly! In fact I find them so beautiful that I recently went so far as to order a book on fair isle knitting (I do not knit! At all!!!) just so I can better understand the color theory behind it.
In general I subscribe to the view of many upthread that ugly is in the eye of the beholder. I don't generally think of prints/patterns as "ugly," even if I don't fancy them for my style or they don't appeal to me. They're not ugly, they're just...not my thing.
However. I am going to say something possibly unpopular here. The patterns at the link you posted don't strike me as ugly so much as...cheap. I know, I know, sorry! But hear me out! It's sort of the pattern version of the idea that dyes used in lower end clothing are not terribly high quality so colors often don't look that great compared to the dyes used in fancier brands. (which is why you hear the recommendation to buy black when you are going low-end.) So here what I'm guessing you have is color palettes that aren't put together with a ton of care and/or expertise, and then relatively cheap dyes that look a bit clashy or whatever in person.
Like one person may not care for Marimekko and another person may not care for Liberty of London...but the design & material quality is clear even if something is not one's personal taste.
I mean lord knows I am cheap, and I will absolutely buy and wear clothing from low-end brands -- sometimes they hit the mark, and sometimes they just...don't.
