PSG signed with Ramos with hope to use him in Champions League. The fact is Ramos is a very experienced player in Champions League, with 3 titles and many seasons played there. His skills and his experience can be helpful for PSG if they need to
I love to see teams not signing with players that gave nearly 2 decades of their life to the team. It shows that this is purely business and it opens the door for players to leave whenever they want to, because let's be honest teams do not have loyalty so why should the players have any? Many people blamed Messi leaving Barcelona during their hardest time, they assumed that other players could have been fired and Messi could have played for like 10 million euro instead and that could have been financially arranged somehow.
However, why would Messi leave money at the table and stay at Barcelona when it is known that teams do not care about players whenever it suits them? See how Ramos was treated at Madrid, and not like he was some horrible player neither he found a place at PSG and yes he hasn't provided anything so far but maybe in the future he will have some games that justifies his signing?
I also hope that Ramos will finally recover from his physical injuries and finally begin to show what he was actually signed by the club for. Unfortunately, this is the reality and big clubs cannot always thank their players, who have been creating glory for their clubs with their sweat and blood for many years. On the one hand, such clubs usually have excellent financial opportunities to do this, but on the other hand, in such clubs, first of all, the result is at the forefront and all financial resources are invested in it, while ruthlessly getting rid of those who can no longer provide this result. However, I would not say that Ramos and Messi suffered a lot in this situation and everything is quite normal for them, there are cases much worse.