Clamscan viruses scanning, too many viruses

I installed ClamAV to check for some malware. It took much time, 4 hours, to scan my PC, and the results are in this screenshot:

I am on Ubuntu 22.04 and tried to stay safe, but I wanted to double-check my PC integrity. Moreover, as you can see I run it again to check the logs as well.

My questions are:

1. How good is it, if anyone tried it before?

2. There are too many viruses, and I think the application categorised some other apps or files on my PC as viruses, not malware.

3. Do you have a better alternative or another solution to check my PC's integrity?

Thank you for your time!