Checked them out. Charts show that mask mandate does not stop virus completely («high COVID cases happen after the mask mandate as well»).

This is a cognitive mistake. First and worst, you don't have a control group — another chart, where masks were not mandatory, to compare if they we're really useless. (But you can compare countries with & without mass-mask-wearing — and it will show that masks were effective.) 

Second, you simplify the role of mask: «it shall fully cure COVID, or I won't wear it». Sadly, almost everything in our lifes does not work this way: things help, not instantly cure.

I don't support forcing people wearing masks by the government — still, saying that they're useless is ridiculous.