You often see a situation where a team is just gutted at not showing up on the biggest stage, so some players will take that frustration out on the opposition once the final result is clear.
Harry Wilson has just been sent off for Wales vs Denmark, and you have to say this is a bit harsh:
Wales are down to ten men after Harry Wilson's sending off
Wales 0-3 Denmark ?
— BBC Sport Wales (@BBCSportWales) June 26, 2021
Pictures from ESPN
In fairness it’s late, it’s stupid and he’s not making any attempt to play the ball so you can kind of understand what the ref thinks he’s seen, but it’s just not a red card offence.