Unless you want to be using tor all day every day, and never make an online purchase or log in on a website ever again, there's really no way to stop companies

Unless you want to be using tor all day every day, and never make an online purchase or log in on a website ever again, there's really no way to stop companies from tracking you. The only way to make that happen is if a regulatory authority forces them to. That's why the GDPR exists.