Extreme Tiredness

Hi, does anybody get extreme tiredness, and are always tired? I probably only sleep like 6 hours a night and I just don’t think I get enough quality sleep at all. My Apple Watch says I get 20 mins deep sleep a night. That’s rubbish.
I’ve drank alcohol both last night and Friday night and I feel terrible. I just fell asleep on the couch. Really snappy and just a nightmare to be around.
I hate it. I just wish I could feel refreshed and have energy when waking up in the morning. It’s horrible.