Indeed, this is a real struggle! It's especially troublesome with an art style where you don't know how they do it. At least some art styles you can try to copy and learn from them, but when you're clueless, it's easy to say "I'll never be able to do that!" Something I do when I run into this problem is I compare my favorite artists to EACH OTHER. Some have simple art with beautiful colors, others have fancy realistic painting, and some have really good stories! They're all different, but it doesn't make them better or worse than each other.
Remember that you can ALWAYS change your style or technique if you're not happy with it! Try something new, even if it doesn't seem like "you" yet. If you like it, give it a try and figure out why you like it! No one is on point all the time, and it's okay to change. In fact, if you were satisfied with your art all the time, it might mean you're not growing as an artist!
If I'm really overwhelmed, I do what @shazzbaa and @avimHarZ do and just STOP LOOKING! It confuses me until nothing I draw looks right, so I take a break. I make some tea, watch TV, read a book. Then in a few hours, I try to draw without looking at anything. I'll get something that is only mine in its purest form, plus it's usually faster and easier than before! Don't think too much about it, tell yourself "I don't care how this turns out, as long as I do something." In my experience, these doodles are some of my best work haha