No one uses bitcoin to make transfers now, ETH is already much faster and cheaper
Yes, and the main problem is the fees and the delayed time of transactions, you should put enough fees to get your transactions confirmed very quick, unless you should use ETH, because you can pay less fees and also the transactions is immeditaly confirmed.
Yes these are the current issue related to bitcoin, but i am hopeful that such issues will hopefully be overcome very soon. In future we can expect that bitcoin will become more updated and all the issues which are now creating problems for its users they will surely be overcome and we will be enjoying using bitcoin in a more good way.