1. Homework is important because it's like brushing your teeth or paying taxes. No one really likes doing these things. There may be times when we don't do them because we don't feel like doing them. All of these things, even if they're boring or repetitive, help you keep control of your situation.
2. Practise does not happen in a vacuum. You have many resources to help you. Doing exercises on paper is ONE way of improving your English, but it's not the only way. The limits to your resources are the limits to your interests: try to find something that you enjoy doing, then do that. Don't forget the paper exercises - but don't limit yourself to ONLY doing paper exercises.
3. Teachers can provide the resources to help you, but we cannot do the learning for you. If you don't do your homework, and if you don't do any practice at all outside of class, that tells me that you are not serious about improving your English. I can help you, but I can't do the learning for you.
4. Think about how much learning English - and being able to speak, listen, write and read well in English - means to you. If learning is not a priority for you right now, that's okay. But don't tell me that it's a priority and then do the things that will stop you from learning. I'm not giving you homework because I have nothing better to do than correct what you do. If I invest the time in creating exercises to help you, and you don't do those exercises, in my opinion, you don't deserve the right to complain that you're stuck.
You only get out of it what you put into it.