I donโt think the issue with Neymar was greed. We all saw him overshadowed by Messi, and this isnโt even a lie. A 39 year old Messi still overshadow great players like Mbappe and Haaland, so imagine what it was like against prime Messi.
Neymar made the mistake of thinking that staying alongside the brightest star dims yours. He wanted to be that โbrightest starโ so bad that he missed out on the fact that Messiโs light added to his.
Neymar finished top 10 on the ballon dโor list from fucking Santos! He was destined for greatness but lost the plot along the line.
And in my opinion, you canโt really blame him. If he never left Barca, he would have felt like he didnโt create his own path and was forever under Messiโs shadow. Leaving Barca wasnโt what killed his career, it was his lifestyle.
I strongly believe that in Barca, Messi to an extent, interfered in some of his habits, either directly or indirectly. He looked up to Messi, so there was a possibility that Messi pushed him to do better there. He wasnโt able to get that at PSG, so he lost that focus, and went downhill from there.