Element. If you are missing something, talk to all those motivated people doing Discord bots or whatever, they can contribute to Element/Matrix. And it’s actually open source, they keep their contributions, contrary to all the work they have done for Discord for free.

Mass strikes. Call your union, other unions, whatever union. Organise a mass strike day. Repeat it every week.

How is this kind of discrimination even legal there?

We are losing the class war.