That's just nonsense to be honest. Literally no other club in Ligue 1 could afford to sign even Neymar alone. How are you going to compete with Neymar, Messi, Mbappe, Di Maria, Donnaruma, etc. if you don't even have 1/10th of the money that PSG has available?
How could you compete with PSG while its competitors are failing vs weak teams?
For example: OM missis points vs Metz, Brest and Angers...
Rennes won vs PSG while losing 2 points vs Troyes and Bordeaux and getting a defeat vs Angers and Reims.
Nice got a draw vs PSG and lost points against Metz and Troyes...
Of course this is football and there is ups and downs. Even the great Bayern loses points vs weaker teams but wasting 14 points in 17 games won't make you dream of the title...
You should win 100% of your games vs weak teams, you should win most of your games vs top teams then we could blame money for the rest.. but wasting randomly points then blaming money for that is simply nonsense!
Last season Lille was able to win the title with Neymar, Di Maria, Mbappe and Navas in PSG. Messi isn't doing extraordinary things here. Dunno if you understand what I meant. Blame the money when you build a winner team and lose the title because the other team is always winning.