I just want to say, at the moment I feel pretty discouraged too, even though I still like to draw and try out new things.
I too get discouraged by seeing amazing artists, some even (close) friends. They have their own defining style and have it worked out pretty well and are able to still continue working on it.
I must say though, there is one artists who is my favourite, for more than one reason.
I know there is a big chance I'll never be able to reach her quality, which is very frustrating,
seeing the time and energy and motivation I sometimes put into drawings.
But when it's different is when I look at her page. Whenever I see her work it looks amazing. And, of course she isn't the only one that makes great works.
But somehow her art makes me happy, encourages me even to try and keep on going.
Maybe you need someone to find, some artist that you can look up to and not feel discouraged by it,
like I do this this certain artist I'm referring to
I wouldn't say 'practise makes perfect', I'm never one to say that. Practise can make someone make better (art)work though, this goes for all things.
Some people are indeed plainly not cut out to be a writer, musician, painter or even a lawyer, plumber (maybe not the best example?), etc. You can think of almost anything, some people aren't simple not meant to be, no matter how much they try.
However, they can improve and become better, and I think you should strive to become the best of what you can be and try.
Not to be perfect, maybe not even to what you want to eventually become, but I think it should also been seen as something fun:
trying to have fun in the learning process.
I do, which is probably why I keep on drawing, even though there are so many things that can discourage me (and do indeed do so too).
This is just my personal thought on he matter, and even though you said you didn't want reassurance/pity, advice or tips, etc, I still hope this helped you in some way
Like I said, this is my personal matter and I figured I;d share it with you, seeing as I'm kind of in the same pickle at the moment ^^;