Basically One of the reasons I've stopped going to even Planet fitness, after my injury I had to start from zero. I'm a 6'3" dude lifting 20lbs at a time and I just feel like people are like "Psh Lightweight" Anyone else go through that? (Been working on a home gym. Bowflex has been working wonders.)
First, watch this video of Oliver Richters, a 7-foot-2 Dutch bodybuilder:
You'll notice that much of the time he isn't working out with particularly heavy weights. On the other hand, no one is going to argue with someone that looks like him...
Now about injuries and recovery from zero. Some years back, I was finally making something of my body. I shed 80 lbs of fat (260 down to 180), then succeeded in bulking up the upper body until it looked pretty good, particularly considering my age. I'd gained a little bit of a belly, and was just getting ready to loose that, and...
POP! Total rupture of the left bicep tendon at the elbow. No, I didn't do it in the gym (I was careful and sensible there.) I did it trying to be superman while doing the housework, while I happened to be on medication that as a side effect weakens tendons.
So, there was surgery. A slow recovery. Then complications, and a second surgery. A catheter in the other arm, so I had two arms I couldn't use. And on and on. For many months. In the end, I had a total recovery, and the arm looks perfect (I've seen others who had a much smoother recovery, but the bicep never looked right again, so I guess I can't complain too much.) But that was after gaining 40 lbs (no exercise, and couldn't cook healthy) and having arms atrophy to look like broomsticks first.
I had regular physical therapy appointments during recovery. First they had me do curls with just a 4 inch long piece of plastic pipe, just to get used to gripping and moving the arm. Then we worked up to half-pound dumbbells (yes, such things exist, they look like dog bones). Finally, I started making progress, and pretty quickly worked through everything at the PT center.
So, they sent me back to the regular gym to continue rehab. I got hooked up with a trainer who at the time (before he got serious about getting a degree) was a competitive bodybuilder, and took home trophies. He was huge. Guys would just stare at him with their mouths agape when he was in competition form. But I learned that not only was it natural, but he didn't work out with particularly heavy weight. In fact, every time we heard someone grunting, followed by a slamming of plates, he would just shake his head. "That idiot is going to hurt himself. He's just showing off, that's not how you do it." Or, "He's going to be sorry in 15 years." It turns out, he had injured himself, and had taken a different view of how to achieve his goals, which also made him excellent for my rehab. And yes, I probably did look ridiculous standing next to him working out with 5 or 10 lbs. But we actually made a lot of progress. And by the way, the serious bodybuilders at the gym all gave me their sympathies, not ridicule. Perhaps it was because the particular injury I sustained was one they all dread the possibility of. But I think there is more to it than that. Some people go to the gym to be seen and look pretty, i.e. for the same reasons people go to nightclubs. Other people go to the gym to be serious about taking care of their bodies, whatever their limitations may be at the moment, and living longer and healthier. You might consider trying to find the sort of gym that favors the second crowd.
I'm in my late 50's, so the body doesn't really want to cooperate. But, I finally have the upper body looking nice, arms in particular (tanks tops are my friends!), but also chest, and suddenly some delts popped up out of nowhere... After learning how you can break yourself, I'm not interested in "going heavy." Perseverance and moderation seem to be just as effective, and I don't really care what anyone thinks watching me work out. I much more value the compliments I've gotten outside the gym, ranging from at work ("Do they rip your shirt yet?") to the guy half my age who came all over me playing with Daddy's muscles. Now just to tackle the belly this summer....then see if I'm brave enough for some new pictures (without my dick).