Kaspersky are a bunch of whiners.
Have Symantec, Panda, McAfee or others complained?
If they are calling Defender inferior [it is], then you have nothing to whine about.
Yes. Defender is free but it's like most people - you don't like IE [or Edge], you download your favorite browser. Only difference is that Kaspersky has no free AV offering.
They also complained that Kaspersky was uninstalled on some computers when upgrading to Win 10. That is most likely because the users is running an older version of Kaspersky that isn't compatible with Win 10.
How many Kaspersky users know they can upgrade to the latest version as long as their subscription is valid. do they advertise that?
How about sending out notifications. Something like "Before you upgrade to Windows 10, make sure Kaspersky is up to date...." Did they do that?
Seems like Kaspersky wants to rake in the money but not do any work to rake it in.