I cant improve quality.
Yes you can! Get better editing software! Try editing more! Read the criticism! I have a feeling you're understanding it as this:
Someone: The acting sucks.
You: forget YOU! I SPENT WORK ON THIS! I TRIED!
But that's not what you should think. You should think:
You: Okay, so the acting sucked. I spent a lot of time, but maybe I should see what I could do better to improve it.
Criticism is not an insult, it's a way of improving. Never defend your video. It shouldn't need defending because it should be good enough so you don't have to. If you're defending your video it means there was something you have to defend. Don't defend it, fix it!
Leave me alone then.
Don't post videos if you don't want comments on it.
Another thing: Pessimism is good in art. That way, if people don't like it, you won't be mad, but you'll be happy if you get positive feedback.