We use the present continuous when we speak about something that is happening now, at the moment of speaking.
We use the present simple to talk about something in general — facts, habits, preferences, regular actions.
regular action → Present Simple
action now → Present Continuous
Sonny reads a lot. But now he is not reading, he is watching a movie.
Anabel usually drives very slowly. But now she is driving fast because she is late for her job interview.
There are action verbs and stative verbs. We do not use continuous tenses with the stative verbs, even if the action is happening right now.
I'm hungry. I want to eat something.
A: Do you need my help now? B: No, I don't. Thank you!
Be always doing something
Usually, the word "always" is a sign to use the present simple. However, there is a combination of always + -ing. We use it to say that something happens too often and that's bad.
You are always losing your glasses. You lose them too often.
Don't listen to him. He is always complaining about his job. He complains about it too often.
I am always forgetting names and dates. I wish I remembered them.
You are being
Usually "be" is a stative verb and we don't put it into continuous tenses. However, we can say am/is/are being something. It means a person is acting in an unusual way at the moment, not as he or she acts regularly.
Your mother is being nice to me today. Does she want something from me? Usually, she is not very nice.
You are being irrational. You are acting irrationally now.
Sorry, I'm being too emotional. I am reacting too emotionally now.