Take a look at the other articles from the same author where he investigated some popular anti-virus products. In particular Kaspersky is/was a mess:
- https://palant.de/2019/08/19/kaspersky-in-the-middle-what-co...
- https://palant.de/2019/11/25/kaspersky-the-art-of-keeping-yo...
- https://palant.de/2019/11/26/internal-kaspersky-api-exposed-...
- https://palant.de/2019/11/27/assorted-kaspersky-vulnerabilit...
McAfee:
- https://palant.de/2019/12/02/rendering-mcafee-web-protection...
And I expect that he will publish more articles in the future.
If you want to use anti-virus I would stick to their on-access scanning and stay away from their web protection...