why do you assume they are on steroids because the are bigger than you.
dont make excuses. train harder and eat more bitch.
Basically, this. If you aren't willing to take the same stuff as the other guys you have to work that much harder with your natural status. I have never made an excuse for not being in shape in my entire life. I'm either on point with my diet and training....or I'm not. Plain and simple. Look at it like this. You don't have to be the BIGGEST BADDEST DUDE in the gym or the most ripped. Just be that guy that knows he left it all on the floor and bust his ass more than anyone else in there. It pays off. I personally am not one of the biggest guys at my gym (180lbs GO GO GO) but I will be damned if I am not one of the most impressive looking and hardest working clowns in there.
So yeah, no excuses. Man up, work harder, or jump off the pullup bar with a weight belt around your neck.