Let me explain you something..... take it as a word of advice similar to what Diddy mentioned. Talking from my experience of so many years using many different antivirus software. Don't write down negative things about avast it make other people think negative things about avast and the word will spread all around. It's up to the only user who makes the decisions of/if they like or don't like avast, what antivirus they want to install, and etc etc. If I was you and before installing any antivirus software (make sure your internet is disconnected), I will do many research about antivirus software it's history, what feature they have, user reviews, and etc etc. If you don't like avast just use other program it's all up to your discretion. No one is forcing anybody to install/uninstall Avast.
Even me I have used tons and tons of antivirus software i.e. McAfee, Norton, Panda Cloud Antivirus Free Edition, MSE, AVG, and etc. Only reason I stood and only used Avast and never ever uninstalled Avast and used other antivirus is because I like what Avast Antivirus Free Edition offered me, it's features, protection, and etc. Avast antivirus software program user interface is very simplified, easy to understand, great to get along using it, use less computer resources, and etc. It's only me and my choice only that I stood for Avast and nobody didn't tell me to uninstall Avast and use another one. I liked what Avast offered me and that's it. Even since buying a new desktop computer with Windows 7 SP1 few years ago, I installed AVG Free Edition in that computer and never uninstalled it and used another one, because of the same reason that I explained it about Avast Free Edition.
Every antivirus is different from each other i.e. user interface, quality of the program such as protection, features, and etc etc. Antivirus software doesn't provide 100% protection they sometimes provide false positives. Every year each antivirus program improves it's design and it's features, protection features and etc... you just have to get used to it and learn how to use it ( I know it takes time)...
Any issue(s) or problem(s) you may face such as getting to know how to use it's user interface of Avast and etc. Me and all other Avast users, forum moderators, and Avast team will always try our very best to help one another.
I hope this makes you clear of everything! You and everyone have a nice day.