You should try AppZapper for an uninstaller.
I am sorry you had problems with ClamAv, I however did not, and I had no problems with the first time run once I installed it.
The GUI isn't very spectacular, but it is free, and it does work, because I have had it find "viruses" in downloaded email messages. GRANTED, they are not "Mac" Viruses. They are usually old PC-based viruses. But, just like a cold, your Mac can be a carrier for the viruses and spread them around. :)
I hope you find an app that you like for your needs.