Yeah, that's a huge issue for sure. If you don't use any of these services, then getting support is incredibly difficult.
The only possible alternative might arguably be Hacker News if the company is a tech one, since there are Alphabet/Meta/Apple/Amazon employees that use this site, and having someone on the inside champion your cause seems to also help things get resolved more quickly.
Don't want to sell your soul to Xitter and the Zuckerverse? No customer service for you.
And it gives companies an easy metric to prioritise tickets: Follower count.