That's not a source. By that metric every American AV has an NSA backdoor. And, ok, both of these are probably true tbh. But Kaspersky publishes extremely good security research and analysis which is just technical and totally possible to verify independently, so there's no reason to avoid those, even if you don't want to use their software.
I don't use any of that software because it is a proprietary black box
That's a different topic, you're moving the goalposts :P
That's not a source. By that metric every American AV has an NSA backdoor. And, ok, both of these are probably true tbh. But Kaspersky publishes extremely good security research and analysis which is just technical and totally possible to verify independently, so there's no reason to avoid those, even if you don't want to use their software.
I don't use any of that software because it is a proprietary black box
That's a different topic, you're moving the goalposts :P