I’m not an American or a lawyer, but surely rights guaranteed by the constitution of the USA exceed any law of any state of the USA?

Some context for the Bill of Rights: mostly yes, sort of, in current jurisprudence due to the 14th Amendment (a Civil War era amendment), the Supreme Court and a process called incorporation.

Read the first five words of the 1st Amendment. It is not a rights grant, it is a prohibition on the legislature of the US Government, but the US Government is not the same as the State governments, and the State governments are not subordinate entities of the US Government, and the United States Constitution is a document that formulates and determines the powers of the United States government, with only a few words to spare on the States. You didn’t mention your country, but most likely this is very different than your own country.

Most States have some sort of equivalent in their own Constitutions, although I have found most of them to be poorly written compared to the gold standard of the First Amendment.

So, your argument is that everyone understands that Twitter’s action is protected under the First Amendment against federal regulation, and the Fourteenth against state regulation, and that's why he has proposed legislation imposing state regulations in violation of the Fourteenth Amendment?

That...doesn't follow.

I think the point of the constitution is you can't override it with legislation.