But in the end you still only make a profit of USD 50, right? never mind, just accept that fact, you still win anyway, it's just a little annoying because you should be able to win more than that but you can't because your friend didn't pay it on time. There's no need to make a big deal about this, because if it's your good fortune, then it won't run away from you, that's the point, don't just because of this gambling, your relationship with your friends becomes bad. It's okay to be upset, but you have to move on and learn from this.
That's a positive point that we can take from this case, although Op failed to get a much bigger win but on the other hand I think he is still lucky to go home still able to bring victory even though the amount is not too large, but on the other hand we must not forget to be grateful for still being given a win, it's better than you go home empty-handed and crying.
Simply maybe I will say that it is luck for OP or that means OP's luck is only with that amount. On the other hand, it's true that it's a little annoying, I'm sure with this incident it looks like OP will have a little trouble with his friend or means a little tenuous in their friendship, but I think it's natural as a form of annoyance that comes out of humans who have common sense. Well exactly, don't think about it too much and just accept what you should get, because basically it's simple if indeed the big win is for you then there will be no possibility of problems like this between you and your friend which makes the big win blocked for you, so I'm not saying you're unlucky but maybe it's not time for that much luck.