That goes from small fiction novels (fan fiction included) on to youtube videos and even multi-media ARG (alternate reality games).
A pretty neat example would be Don't Hug Me I'm Scared, a rather deep exploration of media that I would definitely put into the category of horror.
Another one I recently discovered is the Twitter account @thesunvanished. Twitter as a medium means there cannot be a jump scare. The only way to keep people interested is to keep at the core of horror. Even some of the slenderman ARGs, despite what people might think about the story, are pretty damn good despite using cheap effects (or maybe because they're using cheap effects?).
(Of course, it's all about taste and even the small creators can fail)
This is recognized within the horror fan community as well. There are lots of people on various forums talking about the cornucopia of great horror at the moment, and my guess is a number of fans will spend years catching up on their expanding lists of films to see and rewatch. It's really remarkable.
There's a broader context that I think the author is missing, or at least ignoring: film and visual arts critics don't care about genre, they care about film. Genre tends to create a comparative context that doesn't necessarily exist if your scope is film at large. So, horror films exist to cater to a horror film fan base, romantic comedies exist to cater to that, superhero films cater to that, science fiction, fantasy, and so forth and so on. If it is a backhanded compliment, my guess is the same could be said of any genre to some extent.
In my opinion, the popularity of the late 70s to 80s slasher films (Friday the 13th, Nightmare on Elm St, Texas Chainsaw Massacre to name a few), combined with studios’ ever-shrinking tolerance for risk, resulted in a particularly bland few decades of mainstream horror, with the well-known Saw franchise and, to a lesser extent, the somewhat satirical Final Destination series as typical examples of the era. Personally, I’m partial to the Evil Dead films, Army of Darkness most of all. Groovy.
Horror can be excellent when done well, and pathetic when done poorly. It is easy to go for cheap scares and bloody massacre scenes. There is a lot to dislike about modern horror films that can turn off audiences looking for more than jump scares and blood splatter. If I hadn’t dated a girl in college who was super into the horror genre, I would have never gotten into it.
Horror is best when it floods you with an emotional high that lasts long after the initial shock. For a most masterful example, try playing Silent Hill 2, if you dare.