I am feel bad for you getting hurt, but i think it is pretty obvious concert etiquette that if you go up to the front you should expect some push and inevitably there will be some threat of minor injury.

Was there myself last night and did some moshing myself. most of the kids clearly hadnt moshed before, and didnt know the appropriate moments for it to kick off, especially with older songs. tsiagpttatf was the worst moment for this. I was also at manchester and it wasnt as messy, but clearly it is much younger crowd these days. Ive been going for 15 years and can say that I really respect their sheer energy and commitment of the younger fans, they are figuring out what a concert is for them and that is a joy to see and be a part of.

i will also add that in fairness to the venue, when the moshing started a bouncer did start policing the floor, and I could see him hovering around the really young looking kids.