You can just tell them that you're not interested in such tips :) People are only trying to help, but people are not mind readers.
Communication is the basis of bonds, if you are saying that you are only interested in art as in you are only interested in sharing your art without wanting to engage with the people here, then you should make that clear too.
Self-interest is something that most people don't assume right off the bat in social media. When someone offer you stuff, just tell them your replies and I'm sure people will adapt to your preferences.
I think it's deeper than that. It's not just a personal thing but to see what Steemit is really like. As I said before, maybe I had higher expectations in terms of content and quality.
Well, it is a part of life to always juggle the dissonance between what one expects and what the world really offers. I hope you will temper that dissonance well :)