If you create an online community, then destroy it, you're an asshole. Simple as that.
Actually, it's not as simple as that. If you're being an ass online, and doing in a way that didn't used to be against the rules, but then the rules changed, and they retroactively cleaned up the vitriol you were spewing, that doesn't make you less of an ass, or the people who wrote the rules "assholes". Sometimes, it just means that there's a lot of toxic asshats, and you were lower on their list of "toxic stuff to clean up" than something else.
Simply put, just because a bunch of toxic people have a community doesn't mean they're any less toxic.
A site that used to allow X, but now prohibits X, doesn't make you less free to express your own special flavor of X. You're still free to say it. Or type it. "Freedom" doesn't mean "guaranteed platform".
Keep in mind, I have concerns about how Reddit is managing their site. "Making it less easy for toxic nincompoops to spew vitriol" isn't one of the things I have concerns about.
"Here comes Mr. Bill's dog." -- Narrator, Saturday Night Live