You're going to need to enlighten us some because LiGNUTs will call just about anything malware. -But yes; there is a malware 'issue'. It's far from how dangerous and chaotic F-Droid is. The Play Store is still objectively the safest place to get Android apps.

The stuff that slips through gets quickly removed, they block millions of attempts, and are tightening policies.

Would be interested in your technical analysis of current F-Droid security vs current Play Store with examples.