If you want to regulate large technology companies, just say that. You'll find that plenty of people agree with you. Trying to contort private expression into state expression isn't going to get you very far, either in terms of convincing others or legal action.

(FWIW: conflating "progressive" and "left" belies a fundamental misunderstanding of left-of-center politics. It's a misunderstanding that you're going to want to correct if you want people to entertain your positions.)