When I play the game right clicks do not even register most of the time. Really tiresome when you have to click two-three times to simply move your hero and even then there is a delay. Problem appeared around 3 weeks ago.
Also why the hell is technical support ticket option does not even exist anymore?
Might be that your mouse is trash.
If it is, then why is it fine everywhere else?
We would suggest the following troubleshooting first: https://eu.battle.net/support/en/article/124055
This normally fixes most mouse issues with the game.
If the issue persists, please upload your system files to pastebin.com and reply with the links to the files using the preformatted text option to encapsulate the links.