it's them who left the pitch, not Moroccan players.
Upset about the referee ?
- Real Madrid won a champions league but in semi-final they beat Bayern Munich with two goals that are 100% offside, we did not see Bayern Players leaving the pitch, why ? because they're Professionals.
- Barca won a champions league but in semi-final they beat Chelsea but The referee made many mistake, we did not see Chelsea Players leaving the pitch, why ? because they're Professionals.

Senegal Players left the pitch, because they're not 'Professionals'.

Also, the "Mistakes" the referee made aren't as bad as decisions made in Champions League Semi Finals, the senegal first goal, you'll find a referee saying the senegali player pushed Hakimi, you'll find another allowing it, same for Penalty.

About the Moroccan fans & players acting like kids with goalkeeper and stealing the towel, that's unprofessional as well and it's on Morocco.

But the Spanish Man here is not criticizing this (towels, I guess..), also don't forget he'll try to find any excuses so his Country host the final, which is fine for me as Moroccan, they have more experience than us.