Well, "not-terrible" is not what I would use to describe this though. Then again I'm not a fan of "you just don't understand this random mix of poo and paint" kind of art. No, I don't get why for example 5000 digital scribbles are more valuable or meaningful than 5000 random posts from deviantart. Or Dilbert comic strips or most recent memes on Reddit, which at least are funny at times. How is this act of creating subpar images supposedly more meaningful than a hoarder's decades-long collection of stuff in their home?

Am I wrong to find creations less valuable when I cannot enjoy them? Call it performance art or whatever else you like, it's still nothing more than an overpriced collection of an artist's shitposts. But alright, it's not my money.

Except they are all pretty terrible.

Becoming a great artist usually means creating art every day. It depends on how you go about creating art though. You need focused studies. You need to push your boundaries. There's a shockingly low amount of technical improvement in this artist's work compared to other long-term online portfolios I've seen.

Focusing on quality is the only reliable way to improve quality. The use of quantity, in the "10,000 hours" or "2000 words a day, every day" style of formulation, is to provide ample opportunity for practice and improvement, but quantity alone never can suffice. With no focus on quality, all it gets you is the same work over and over.

There's a writer who did a lot of short stories and I had read a couple of them decades ago and thought they were some of the best of all time. Also, they won awards and stuff. I really placed them on a pedestal.

But more recently, I found that a multivolume collection of all the short stories is available, and I started reading them. It was really disillusioning because it wasn't just that the average quality was a lot lower than the famous ones, the cringeworthiness started to extend to my image of the author.

It's possible that over time the later work ended up being uniformly brilliant, but I didn't finish.

Sure, but the point of the practice is to produce quality, and then display the good bits of your production because mixing the few good ones into the deludge of average works isn't very helpful for the audience.