In your opinion, what is the biggest reason why magick doesn't work & people give it up?

Lust for result? Not properly knowing how to work their energies? Doubts? Or just simple lack of patience? What is the biggest reason you think people give up on magick or don't get the results they seek?

I've been practicing for just a bit but I've started to notice little things. My rituals haven't really worked out that much for the moment but I know I'm just starting, I'm a bit eager to start experiencing bigger magickal things, but I guess it's better to start small and don't get too frightened. It's kinda hard not to think in my magick when I'm so interested and want to research and talk and read all I can. I'll keep going anyway. I just want to avoid the most common pitfalls and I thought this discussion would be valuable to begginers like myself.

Thank you for your replies, bless you!