If you don't like a service then don't use it. Twitter is not a public utility. The phone company banning you from accessing the internet would be a public utility depriving you. Being banned by a website is not the same, even if it's popular.
Gripe about Trump's ban. Fair enough. But do not demand government intervention. Think about what you're asking for. Do you want the government to have the final say over Parler? Or Getbig?
A business or website succeeds according to market appeal, not legislation designed to [once again] "protect you." People will figure it out and vote with feet and wallets, just like always. Go 'way, gubment.