Don't use it, don't invest in it, try not to give those kinds of companies any kind of money. Spread the word.
Brush up your media literacy. And there's no harm in trying to influence the world by politics. You can always call your representative, protest, write open letters, or try to form a group and demand laws being passed to force OpenAI to implement watermarks and not buy up half of the south of the United States to build the dirty version of compute datacenters.
Edit: And tell other companies, you didn't like their customer "service" chatbot. Maybe it'll trickle down the supply chain.
Edit2: Also use Linux and Free and Open Source Software. 😅