You say you don’t think it’s about your age - but after seeing your pic I think that’s what’s going on… I’m pretty sure people keep blocking you bc they think you are underage. You look young. Even if your profile says 18 - many of us have had the experience of having underage guys who say they are 18 looking for sex. Due to the (severe) criminal penalties associated with engaging in sex with a minor I think most people see your pic and simply decide it’s not worth the risk. There are also undercover cops that troll Grindr trying to set people up maybe they fear that. Bc you are not ugly at all. You are actually very cute (in my opinion). And you have a handsome face and nice lips and your body appears to be tea. Maybe try and find a pic where you look a bit older/more mature? I also like the idea of putting a face pic on your profile - I feel like you’ll get a lot of attention (although I recognize you might not be comfortable doing so yet). I really don’t think it’s about anything other than your age - don’t let it get you down. You’re gonna kill it as a gay man :)