If a company has decided to use reddit as the only way to get real support you have 2 choices: use reddit or stop using the product.
If you use a product who would force the use of reddit to get support you have made the wrong one.
Make a reddit account
No, don't.
You mail them a fucking letter saying, "Leave meta."
You call them on the phone and say, "Leave meta."
You visit them in person and say, "Leave meta."
Hack into a defunct spy satellite and carve "LEAVE META" in the countryside using its lasers.
People exist outside of meta. They breath, they eat, they shit. Find that pile of meat that exists outside of zuck's servers and get a message to it.
Shit, how did people communicate before facebook?