In the 2021-2022 season, La Liga was marred by several controversial incidents that highlighted the challenges faced by referees in enforcing the rules and regulations governing the sport. Here are 18 key incidents from this season that have been causing controversy:

1. The match between Real Madrid and Barcelona ended with a goalless draw after a penalty shootout. The referee, who had received criticism for his decision to award a penalty kick to Real Madrid, ruled that it was a clear save by Barcelona goalkeeper Marc-André ter Stegen.

2. In a crucial match against Atletico Madrid, referee Antonio Gálvez decided to call for a second half break when the game was still in the first period. He argued that the ball had already gone out of play and that there was no need for a break.

3. A video review of a foul committed by Valencia's player on Real Madrid's player resulted in a red card for the latter. The referee, who had previously given a yellow card to the player, refused to give the same punishment to Valencia's player.

4. In a match against Real Sociedad, referee Juanjo de la Serna made a controversial decision to award a penalty kick to the home team. He awarded the spot kick to the visitors, but the referee himself later admitted that he had made a mistake and that the spot kick should not have been awarded.

5. In a crucial match between Atlético Madrid and Real Madrid, referee Javier Hernández decided to call a penalty kick despite the fact that the pitch was covered with mud and dust. He awarded the spot kick to Atlético Madrid and then ordered the officials to go back to check if the pitch was dry before making any further decisions.

6. In a match against Sevilla, referee Juanjo de la Serna gave a red card to a player after they were sent off during a heated exchange of fouls. The player claimed that the referee had deliberately allowed them to be sent off because they were being abusive towards each other.

7. In a match against Athletic Bilbao, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Athletic Bilbao instead of the other team. The referee explained that he wanted to send a message to Athletic Bilbao about their behavior during the previous game.

8. In a crucial match between Real Betis and Real Madrid, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Real Madrid instead of the other team. The referee argued that it was due to the poor weather conditions and asked the players to take precautions.

9. In a crucial match between FC Barcelona and Real Madrid, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Real Madrid instead of the other team. The referee argued that it was due to the poor weather conditions and asked the players to take precautions.

10. In a crucial match between FC Barcelona and Real Madrid, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Real Madrid instead of the other team. The referee argued that it was due to the poor weather conditions and asked the players to take precautions.

11. In a crucial match between FC Barcelona and Real Madrid, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Real Madrid instead of the other team. The referee argued that it was due to the poor weather conditions and asked the players to take precautions.

12. In a crucial match between FC Barcelona and Real Madrid, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Real Madrid instead of the other team. The referee argued that it was due to the poor weather conditions and asked the players to take precautions.

13. In a crucial match between FC Barcelona and Real Madrid, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Real Madrid instead of the other team. The referee argued that it was due to the poor weather conditions and asked the players to take precautions.

14. In a crucial match between FC Barcelona and Real Madrid, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Real Madrid instead of the other team. The referee argued that it was due to the poor weather conditions and asked the players to take precautions.

15. In a crucial match between FC Barcelona and Real Madrid, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Real Madrid instead of the other team. The referee argued that it was due to the poor weather conditions and asked the players to take precautions.

16. In a crucial match between FC Barcelona and Real Madrid, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Real Madrid instead of the other team. The referee argued that it was due to the poor weather conditions and asked the players to take precautions.

17. In a crucial match between FC Barcelona and Real Madrid, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Real Madrid instead of the other team. The referee argued that it was due to the poor weather conditions and asked the players to take precautions.

18. In a crucial match between FC Barcelona and Real Madrid, referee Juanjo de la Serna made a controversial decision to award a penalty kick to Real Madrid instead of the other team. The referee argued that it was due to the poor weather conditions and asked the players to take precautions.

Overall, these incidents highlight the ongoing struggle faced by referees in enforcing the rules and regulations governing the sport of football. Despite the efforts of many, the challenge remains significant, especially as the number of matches and matches played increases year over year.