As someone who's read all of H.P. Lovecraft's solo works, I've got to say that I heartily enjoyed that reading where the crazy dude gets turned by an eldritch horror (think it was maybe supposed to be a shoggoth). From a technical standpoint it was decently written, and it subtly reference no fewer than five Lovecraft stories. It also continues Lovecraft's themes of sexual congress with horrific extradimensions beings, knowledge leading to insanity, and the idea that only our ignorance of the unknown is our only defense against it.
That story was easily more enjoyable and faithful to the spirit of the Cthulhu Mythos than anything August Derleth ever wrote. If H.P. Lovecraft rose from the dead with a raging bonk-on, he couldn't have done a better job.