I do understand that technical problems are incredibly frustrating. I feel your pain, and I try to help others get past this hurdle. I'm going to ask you to just trust the next couple points:
Judging from the emotion in your post, you need a break. Just walk away from this project for 24-48 hours and give your mind and body a rest. Do something that you enjoy. When you come back to these problems with a fresh and rested mind you will be able to try again and succeed. A fresh brain is an AMAZING thing.
Know that AirVPN is not the cause of these issues; you are in the right place. You are posting among torrenting LEGENDS who could use any VPN they desire, and they chose to be here. Trust that there is a good reason for that and that you made a great decision to be here.
Assuming that you are now well rested, please start again by looking at my stack. This stack configuration has literally torrented hundreds of terabytes; it works!
Then, check your AirVPN profile to ensure you set everything up properly and did not rush over or skip a step:
When you go to the devices screen have you set up a device?
In the ports screen is that device linked to the port (in the dropdown)?
When making your config file did you select that device?
When working correctly, the sessions screen should list your device at the top of the card when connected; does it?
If you accomplish all these things and still have an issue, post again with the current status of things and I'll take another look.