To be honest, when I heard about PSG fans mocking Messi's performance for not being able to give the team the UCL trophy, I see Messi's decision to move as a wise decision. GOAT will continue to change and we will see other top young European players who replace the two old stars.
Instead of PSG fan to direct their frustration at their incompetent management that have not been able to buy the right place for their club, they'll chose to attack a certain player. They did it to Neymar few seasons ago and they did it to Messi this season. At this rate they'll soon turn on their golden boy Mbappe.
PSG have a bad coach, a bad midfield and a bad defense but they blame Messi for all their losses. They expect Messi to replicate his world cup form but they forget that the Argentina world cup team played like a team, not that individual football that they play at PSG.
I don't think anybody would ever be replacing Messi in football. I watched Messi from the beginning of his career till now and I can boldly say nobody will ever do it like Messi against.