I want to jump in here. Mostly because I like to stir the pot. I find concern about style on this site funny. I mean basically it's all some variation on a typical manga style. (Yes, this is a broad generalization. And no, it's not really a bad thing.) As an artist with a traditional format and a "western-style" who's is in the minority, I can't help but find it funny.
In regards to your style, style is a byproduct. It's a result of your work. I literally give style zero consideration. If a criticism you receive involves style you can assume that that person has nothing valuable to criticize. It's a generic way of saying, I don't like how this looks. (Which is a preference, not a criticism.) I know. I know. It's hard to hear and still sucks. A real criticism involves analysis. Don't let it get to you.
Others have said it, but style is flexible and fluid. It shouldn't define you. You define it.
Also, this is the place to come to vent about these things. I imagine a lot of artists have had similar experiences. I know I have. Bad critics come with the job. Keep up the work and you'll be fine. Good luck.
(If you want real/fair criticism, link some stuff and I'll give you some pointers and resources to help you improve. )