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Pochettino failed, therefore Enrique was hired. It's like throwing coaches at the problem and hoping something sticks. Leverkusen's Xabi Alonso is performing miracles with a cheap squad. Friends, thats coaching
The owners of PSG may be wealthy, but they don't know how to develop a squad. Imagine handing a monkey a typewriter and expecting Shakespeare. You might get some excellent lines, but it won't be great. PSG will likely keep dominating Ligue 1, but they'll keep losing the Champions League. Yes, money can't buy happiness; or a Champions League trophy
That is 100% exactly the problem. Chelsea had tons of money and I remember when Mourinho was in his prime and they won several titles within three years. Money has to meet quality decisions, otherwise it is as you said: throwing coaches at problems.
I remember when Tuchel was hired and had issues with Leonardo from day one. Correct me if I am wrong, but I think there was tons of trouble because Tuchel wasn't allowed to sign players that he thought would be perfect.
I know that the sporting director is often responsible for signing players, but does anyone here think that Pep Guardiola, Klopp or Ancelotti would be ok if they didn't have a say in which players to sign? Never. All the scouting and stuff, yes somebody else has to do it. But these top coaches know 100% what the missing piece of their puzzle is. And they all have in common that they know how to spot young talents and when to give them a chance, both in less and in very important games.
But to be fair, we all can see how difficult it is to win the Champions League and how close these games end and how they got decided. Guardiola only won the CL once with Manchester City and they got tons of money and an amazing coach. Often times the difference between winner and loser is so marginally small.