Would you be angry if you send a text message to a friend and the other party doesn’t reply promptly?

This is her own problem. If she is like this to everyone, she should be worried because she is not you. If she is only like this to you, it means that she does not care about you and does not really care about you. Ignore you, why bother with someone who doesn't really want to take care of you. Therefore, getting angry only shows that you have a bad temper. As for whether you want to delete her account, it is up to you. Whether you must send text messages to her, whether you must care about her reply, whether this friend is good to you, and how helpful it is, all depends on you.