I just told that once I get a few rejections out of the way, I can approach anyone, no fucks given.

Now this 10 minute lesson for him turned out to get him 3 Kcloses in one night, while I didn't even get one. This just goes to show again that looks matter, of course they do. So at the end of the night I was happy for my friend, but I was pissed off at myself and thought about not going out anymore, stupid I know.

Has anyone here thought they were improving, but later on, the results were heavily inconsistent?
Do any of you consider yourself below average looking and still get good results in interactions with women and get laid?

First of all, that's some great advice you gave to your friend. Starting your night out with an intentional rejection or two is what a lot of the greats do to get a crazy momentum going.
It's more accurate to say "looks count" rather than "looks matter." When it comes to attracting and seducing women, everything counts! Looks included. Fortunately we can compensate with other things like game and passion.

Don't let that get you down, though! There will always be someone better than you in some way, but only you have the unique combination of strengths and characteristics that make you your own individual player in this game. Your better looking friend will have an immediate advantage in his own way, and you'll have yours, even if it's not as immediate and socially accepted.

Keep exploring and you'll find your consistency through persistence.

I'm personally not an "expert," but I do remember Tyler Durden saying that a lot of people get initial success when they first start out because their genuine nervousness makes them attractive, but then when they get used to approaching they lose that and then they go through a "few steps back moment." After this is when, according to him, someone starts actually getting good at pick up. Like I said, I'm only saying what he said and I can't tell you exactly which video he said it in (It's either one of the ones on youtube or the blueprint.)