Looking on the internet deeply has found these results:

none of this matter is the most popular phrase on the web.

none of this matters 1320,000 results on the web	none of this matter 11,930,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
But now, if war comes, none of this matters. But now, if war comes, none of this matters. Anyway, none of this matters; the Irish have proved that you can adopt whatever rules you want. Because... we're all... ridiculous, and none of this matters. Once the war is over, none of this matters. But here's the thing... none of this matters without me, right? If you don't have a way off this island, then none of this matters. So none of this matters until Bonnie is back in touch with her magic.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

none of this matters

1320,000 results on the web

none of this matter

11,930,000 results on the web

More popular!

But now, if war comes, none of this matters.
But now, if war comes, none of this matters.
Anyway, none of this matters; the Irish have proved that you can adopt whatever rules you want.
Because... we're all... ridiculous, and none of this matters.
Once the war is over, none of this matters.
But here's the thing... none of this matters without me, right?
If you don't have a way off this island, then none of this matters.
So none of this matters until Bonnie is back in touch with her magic.

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.