A doorman’s job first and foremost should be to pacify not teach a lesson. You are there to diffuse situations, not to take revenge or deal with the scum in our society, we have the police force for that and even though we may all feel they are not doing it as well as we would ourselves, that’s the law and a good doorman stays within the law.
Second I don't personally feel working the door gives you 'life experience'. Sure it gives you an insight into how people react when they are drunk, drugged or being egged on by a group of 'friends', but it is hardly reflective of their personalities 95% of the time. There are many better things you could be doing to gain such experience I would suggest and in fact working the door will give you nothing more than life experience of the worst aspects of people which you don’t really need to experience to learn anything.
I know nothing about you, but maybe you should look at putting your frustrations into another direction, maybe into Rugby Union or Amateur Boxing, both of which served me well as a kid and taught me that there were many people much harder, tougher and stronger than I would ever be, and that 99% of the time it was not the goby, loud mouthed, tattoo'd tough nut who you saw down the pub.
Such environments would also give you a far greater insight into life I would suspect too, and have great social circles from which to gain valuable experience and insight. I have never worked a door nor would I wish to, it’s a horrible job but someone has to do it and fair play for taking up the reins, but I think your mindset seems to be off kilter with the job at hand, based on your post here which is all I have to go by.
I can fully understand why you want to iron bar idiots, I get that feeling 4 or 5 times a day but the fact remains I will be breaking the law and lowering myself to their level, which means they have won in real terms, and going down for slapping an idiot who will still be an idiot in the morning is wasted energy.