Bitcoin transfer times are getting longer. I am not very happy with this situation. But bitcoin value is increasing. People's interest in bitcoin is growing. For payments instead of Bitcoin, XRP or Eth can be preferred.
I think the transaction delay may be what is pissing some people off, and that because they are not implementing the use of Lightning Network. Most people don't even know it exist yet they complain of slow transfer. This is why every cryptocurrency enthusiast should read deeper about Bitcoin before engaging in it.
Delay transaction when sending bitcoin depend with how much transaction volume during you sent your bitcoin to another wallet, when you send have little other transaction with bitcoin just take few minute for receiving bitcoin to destination address, but when you send bitcoin have other transaction waiting little long time.
Yes increasing the number of bitcoin for each transaction is actually the number of bitcoin as if you will transact more bitcoin so it will take more time and for some it will take little time. Long ago people have paid high free and also waited long time for the transaction from one wallet to other even for 24 hours and now we are so much facilitated so better keep patience than complaining.