Videogame addiction disorder is more and more recognized as a mental disorder by health professionals ( https://www.google.ca/amp/www.independent.co.uk/life-style/health-and-families/video-game-addiction-who-gaming-disorder-social-media-world-health-organisation-a8131166.html%3famp and https://en.m.wikipedia.org/wiki/Video_game_addiction for instance). If you feel like DotA is having a highly negative impact on your day to day life, you may want to seek help with a professional.

I am myself struggling with my ability to control myself when it comes to gaming (95% DotA) and flirting with the idea to seek help myself as it does have negative impacts on my own life. I'm pretty sure there are legions of us. You're not alone in your struggles.

I hope this helps!