Responses
But seriously Doyun IS stronger than all the other Alphas, even the one bully bro tried to tease him about it, how could dojun feel bad about being one of the many alphas not as strong as his baby bro? Knowing how badly his parents wanted an omega should have made him want to be one but I don't get those vibes from him. He wants to be more alpha like for the doc right now. So that is why I think he is just insecure socially. The doctor prob took his virginity.

Ok I get it...the parallels between jinhyuk the doc and taehan...they were both all alpha this and alpha that...it was part of the reason why taehan and doyun didn't get along. Taehan kept comparing him to alphas bc he didn't look like an omega and that fed doyun's insecurities.
In dojun and jinhuk's case, well the doc ALSO DOES NOT KNOW dojun has alpha insecurities, what he does know is dojun is mostly friendless and socially awkward-that's a different issue altogether. Remember, dojun is stronger than taehan and prob all of his alpha brothers so that shouldn't affect doyun at all as a complex. Doyun just doesn't want to be alone, so he wants to be alpha enough to keep the doctor interested since that is the doc's kink.
Btw, he has stamina but he wasn't enjoying the sex, the doc sucks as a top.