The fees aren't high, the recommended fee right now is below $1 If you don't use the recommended bitcoin wallets you could end up paying more because some wallets don't have the option to customize the fee.
If waiting for a few minutes is slow you could use the lightning network.Once you make more transactions you'll get used to the increased waiting times.
He needs to be oriented with other options when dealing with bitcoin.
Also, if he compares it with traditional payment system like WU, can he still say that the fee is high and tx is slow?
I guess he will change his mind if he will come to know other options such as using your own bitcoin wallet to transfer funds or utilizing the LN.
He has a lot of things to learn when it comes to crypto, so he should read the beginners section and other sections as suggested by one user here.