We didn't shadowban you as such, but software kills comments when account karma goes below an extremely low threshold. That's because accounts basically never reach that state without getting involved in some guidelines-breaking flamewar.
A quick look at your commenting history suggests that this was the case here. We warned you repeatedly, in fact:
That's the sort of history we do ban accounts for, for what should be obvious reasons. Also, please don't create accounts to break the site guidelines with and please don't routinely create accounts, which is itself against the guidelines: https://news.ycombinator.com/newsguidelines.html.