Sorry about this frustration. That's definitely not a typical experience with the application. Could you please share a small video or screenshots of the issue. Also, please confirm which OS and version of Illustrator you are working on?
We are sorry that you facing issues, but as you would also agree that a software is a complex piece of system with lots of moving parts. I am sure most of the issues you are facing should be solvable as lots of people around are using this software and generally satisfied. So we would request you to send us specifics on every issue that you are facing and the fabulous community out here of the fellow users will surely find a solution for you. Let starts with the version of your software and OS as asked by Srishti