If you don't want to be banned, you're welcome to email hn@ycombinator.com and give us reason to believe that you'll follow the rules in the future. They're here: https://news.ycombinator.com/newsguidelines.html.
(Since someone is now about to accuse me of stealth Brexit sideage—no, this is just about the tiny business of moderating an internet forum, and that is all.)
I don't lightly ban a 7-year-old account, but (a) we've warned you many times:
https://news.ycombinator.com/item?id=22976700 (April 2020)
https://news.ycombinator.com/item?id=20912638 (Sept 2019)
https://news.ycombinator.com/item?id=20477028 (July 2019)
https://news.ycombinator.com/item?id=19765448 (April 2019)
https://news.ycombinator.com/item?id=17865589 (Aug 2018)
https://news.ycombinator.com/item?id=17623237 (July 2018)
... and (b) you've broken the site guidelines repeatedly lately.
This is meta navel-gazing and is generally not considered on-topic or useful here. That's probably the main reason for the downvotes.
To try to answer the question though, since we're already here:
There are two (at least two) definitions of "free speech" in the US. The "strict" one related to the Constitutional principle enshrined in the 1st Amendment which basically means that the government can't make certain speech illegal and then put you in jail or otherwise punish you for what you say. For better or worse, the courts have generally ruled that there are limits to that though, hence the old saw about "yelling fire in a crowded theatre".
Beyond that, some people look at free speech in a colloquial sense as meaning something like "I can say anything I want, anywhere I want, anytime I want, and nobody can interfere in any way with my doing so". This would mean, for example, that a private web-forum like HN banning an account could be seen as a violation of "free speech". This is not even close to a universally accepted definition, but at this point I guess we could say it's close to being "widely adopted" at worst.
I think most Americans though, accept that as an individual no one of us has standing to compel another individual, or private organization, to assist in transmitting, propagating, relaying, or distributing our speech. So HN banning an account may be distasteful to some people, but it's not a violation of the principle of "Free Speech".
YMMV.