You shouldn't insult a person just because he couldn't score a penalty, I understand that someone bet on Real and can blame Mbappe for the defeat. I also bet live with a handicap of +1 on Real and I hoped that Mbappe would be able to score, this could have been a turning point in the match, but he missed this opportunity. It is obvious that Mbappe plays under a lot of pressure, they expect much more from him than he can show, and it is obvious that Vinicius was missing in this match.
Buddy you're right using some words that are insulting for someone because they couldn't do things right is not good beside thats a penalty which I don't think we even need to blame mbappe much on that, in penalty if the player score it is luck likwise when the keeper save the ball, I don't think penalty is a criteria to show that someone is a star, for me thats natural but let's be realistic, personally i don't understand mbappe again may be i will attribute his recent illed performance to the fact that he has not adapted to the team which may take him up till next season to do that or he is in a kind of pressure because I noticed that he is not stable as such may be those are the reason why his having those mistakes made.
As for the bet of a thing, lets not always have this emotions disturb us, if you place a bet based on the sentiment you have in your mind that a particular player or the entire team will deliver, it shouldn't be a criteria that it must surely happen as you expect it to be, a quick reminder, it's a bet which is gambling and I believe as gamblers that has been in the system by now we should have known that bet is full of uncertainty so any outcome should be seen as what was meant to happen due to circumstances we can't tell atleast with such mindset we will be at peace, no doubt there was much lapses in that match from Realmadrid side which is now history so for me they should be thinking of ways to avoid repetition next time.