I have been having this problem, which is still a problem, that whenever I see someone else doing the same thing as me but better and in less time it affects me. For some reason or another I seem to compare myself to how good others do in the things that I am doing as well as how fast they do it in. When I first started drawing I would see other artist's pieces and I would go and check to see if they out their age and whenever they were younger than me  it would question myself as to why I wasted so much time. I currently am in a better place (that place being "not caring") because it got annoying and took away time from me learning about myself. I hope you guys can take something from this, relate to it in some way, and know that you are not the only one feeling this way. Please stay cute cause its my life force (currently the only male succubus).