This is because inter Milan has refused to bring in younger players to strengthen their squad and this has impacted negatively on the and we saw that in the finals of the Euefa champions League finals were they were humiliated by PSG, inter Milan should start a rebuilding stage if they are to come back to competitive football challenging for titles.
In the Club World Cup final, Chelsea won against PSG with young players, and PSG defeated Inter Milan with young players, meaning that if you want to improve the team's performance, you must rely on young players. Yes, the team needs experienced players, but a young player can perform as well as an older player, but he cannot perform like that young player. Inter Milan must get out of this misconception and recruit talented young players to the club and develop them in their own way. If you build a team like this, you will see that Inter Milan has become a strong team again and this regret of losing in the final is gone.
The people you are referring as young players are people who are coordinated and are eager to show the world what they have got, there are a lots of young player out there who are playing absolute rubbish so you have to specify when you are talking of young players and again young players can not be compared with old players in terms of experience even though the young players has all the skills in the world you don't compare them because there is always a difference unless an old player that doesn't know football. And the reason why Chelsea was able to defeat PSG was because of the 2 goals they scored in the first half and secondly Chelsea is not a small team.