Please, even if someone is great at pyro it'll never stop folks hating them. There's something about them which makes you wanna throw you're Pc at the first guy you see.
I think your just mad because you get killed by them all the time and don't know how to kill them.
As for me, I don't W+M1. By using the shotty, it usually confuses people as most noobs just W+M1, so sometimes they make mistakes while trying to adjust. I'll just keep shooting them till they get close enough and then light them up. Then, depending on what they do, I'll choose a weapon to finish them off. The only time I'll W+M1 is when they are facing the other way so that I get crits with the backburner. Also, I usually only use pyro when rushing points. Also, because I play Orange_X3 a ton, a pyro really helps when capping the middle point.