I think if it only takes 5-30 minutes for a transaction is very normal because each transaction requires a queue until the transaction that we make is immediately completed. and may be caused by a network that is busy because the network can also affect the speed of the transaction process, so my advice is to be more patient in conducting transactions because my experience has been to wait up to 1 hour to complete 1 transaction process.
It's very normal and I've told him that there were transactions stuck between 1 hr and more than that. There are other altcoins that are almost instant but I don't prefer using them, I'd like to support bitcoin and take 5-30 minutes of transactions and wait.
Compare to the traditional waiting time of sending payments online, the original period of time would be days.