1- everybody here thinks there is some vast dedicated team of uber security experts sitting in Redmond, WA developing Windows Defender
nah... not true.
2- a lot of it is subbed-out to India and the former Eastern Block
1- Not all of them, but probably some.
2- This is known since ages, i worked in the security industry, most of my colleagues were Ukrainian , Russians and (especially) Indians (decent skills, low salary demands).
and if Windows Security doesn't block it at the very beginning, there is a high probability that the system will be compromised
This applies to any software in the world... Do you think a security solutions' first release is invincible?
if an attacker is really focused to target a system, has the skills, resources and time, he will succeed whatever it is Windows 10 security or a 3rd party vendor that protect the system.
There is some security mechanism that works very well (not prefect obviously, like everything else) and even better than 3rd party products but they are mostly oriented for businesses (Win10 Enterprise).
Home Version users will never get them, so will have no experience with them, and most don't even know their existence...
Look at
@Andy Ful Hard Configurator, it just use what Windows 10 offers to make some hidden Windows built-in security accessible to Home Users.
Just using it, make WD as solid as some 3rd party AV. Then add Applocker/SRP and co; and you can't deny Win10 security to be subpar; far from it.
however fanbois don't wanna hear this despite facts proving it have been published over and over
it's hard to convince people who don't want to believe in the first place
Indeed, like everywhere, but if the parties has no experience or skill in infosec, the debate is just for show.