He's deficiency isnt transfer. His deficiency is his inability to correctly asses the player on his disposal.
How on earth does he sanction 80m for a player he coached before. Those price are reserved for 90% success rate players you bring to play in their favourite spot and fully analysing his strenght and weakness.
2 years onward ETH dont even know what to do with Antony.
Manager should decide if 80M or whatever the price reflects the player they targeted, even if it's not their money. It's in their job description to estimate a player's worth. There's a different between overpaying due to circumstances and fully gotten it wrong.
As much as our transfer isnt decided by a manager alone, he should be having a big say in it. Saying he has no control over price is a cop out. Manager would be given budget and should analyse how to best utilise the budget. You just dont become a manager and turn a blind eye on the most important aspect