Woah, this looks super awesome!

looks real cool! :O

re: Ok, I'm gonna critique a couple of your pieces then I guess lol

Overall, I reallllly like your style! It's very fluid, confident, and your obviously super in your element with a majority of your pieces. That's good, because self-confidence is CRUCIAL when it comes to improvement. You won't always make good art, and people won't always respond generously; you need to be the driving force that keeps yourself going in these times.
Another thing that helps people improve really fast is trying out new things. This is also good, because you've obviously been doing a lot of that lately lol. That's why your FRUSTERATED. You're trying new things, and you can tell that you're really heckin close to getting it right. EMBRACE IT. Use these times to expirement 24/7. Try literally everything you can think of. Dissect what your favorite artists are doing. Figure out what in particular you're struggling with.
The thing about art is that you're always going to struggle with something. Always. The thing that makes d,amn good artists is that they can train themselves to diagnose the problem and teach themselves out of it.

tl;dr - don't lose hope and keep keepin on? Sorry for goin all TED talk on ya, I'm gonna actually critque the next piece don't worry lol.