my second time drawing something in flash.made in less than a few minutes.

Why do you bother posting something that you've only made minimal effort in.

Building off of Lobotomizer's statement (albeit was kind of negative), while it might seem impressive that you drew something extremely fast, taking your time to really work on and refine a piece is much more beneficial to you than a quick and messy lineart sketch. It's kind of how art works; the longer you take to focus on fixing mistakes or really make that button look like a button, the better the whole image would look. Quick studies are fine, but those are better suited for gesture drawings, I feel that something like this would have much more justice put behind it if you took even 15-30 minutes to refine things.

the more i focus, the more shitty my drawing becomes.
i dont know why but if i focus on a drawing, I draw something else.

Well, there's what you should focus on then (ironically). Whether you're planning to become a professional artist or you just like to draw casually, art that looks really cool is never made in 5 seconds, plus there's a lot of chance left up to drawings done quickly coming out looking good. Experiment and try to find a way that works for you to better your focus on a piece, i.e. putting down all of the details on paper, or doing quick sketches, then the final product. Whether you take my advice and want to improve is up to you though, I think you could make some pretty cool stuff if you tried.

I draw better in real life because it's really hard to draw with a mouse actually

Do your basics. Shitty flash drawings aren't easy to cnc so that's p much all I can say.

Loomis, Hampton, Vilpu, Proko, Sycra have fun

Quote from Styrx Rix

I draw better in real life because it's really hard to draw with a mouse actually

Nobody is insinuating your actual skill level.

Take the criticism and stop making excuses

I would recommend using line tool for art if you're stuck using mouse, I know how you feel, since I made mouse art for a long while. It'll take a long time but in the end it'll look better than brush for sure. Especially if you're going to be doing lineart like this, and not solid color vector art kinda stuff