i know it feels bad.
i know it's uncomfortable.
light these fuckers up. tell 'em NO. "If you want me to take off my mask I am happy to leave instead" works. I've backed down store people, doctors, and cops by firmly insisting.
If they keep pushing, tell them you're sick and don't want to get them sick.
PUSH BACK. KEEP FIGHTING.
normalize masking. the shitbags are fighting hard to make it illegal.
IMPOSE COST
Make it uncomfortable FOR THEM
No lectures, no explaining, FIRM NO