I like it

Thanks! I'm definitely happy with how it turned out, especially considering the persistent writers' block I've had for several months now.

That sucks, hopefully this will have broken that.

Hopefully, indeed.

There are a couple of things I can see that may improve the piece.

"Sorrow will be gone soon" changed to "Sorrow will be vanquished soon" I feel it flows better and works with the demon line in the other verse

"Pleasant ends to these tragic scenes" changed to "Pleasant ends to tragic scenes" Again seems to sound better to me that way

The funny thing is, those are both issues I dwelt on while I was writing the poem. "Sorrow will be gone soon/Joy returns in good time" is meant as a sort of standalone thought, regarding the replacement of my own sorrow with joy, but I agree that "vanquished" would fit better with the demon reference in the first verse. As for the last line... Yeah, that works either way, I suppose. I was kinda going for a finishing sort of cadence since it was the last line, and "these" helps to slow it down, or it does the way I read it, at least.

I'm just not good enough to make these things clear in what I write.

I guess for the last line that makes sense. Your writing skills are well beyond mine, so I think on the whole its great.