>The main part of that negative feedback is effective competition
The comment you responded to allows for "corporations that abuse us" to include those that actively try to prevent effective competition. You don't really explain why being antagonistic to those corporations would be a problem.
Yeah, sorry. Yes, corporate activities that reduce competition or corrupt regulators should have their agents and causes ripped out branch to root; they're like diseases which attack the immune system, doubly bad.
But the premise that a corporation or a country that does bad things means you are justified in antagonizing or destroying the entire company or the people is typically enlistment and leverage for protection rackets.
Warring with others is a cycle that doesn't end, and mainly elevates military resource providers. Warring with yourself - attacking your own organs - is self-destructive (which is why enemies stimulate it).
As for here vs there, 20th-century totalitarian systems all stemmed from people wanting to believe promises of a better world, and the promotors being unbound by facts of the present. "Here" is a much more tractable problem, where our medicine (or immune systems) could get better at stemming the diseases we have, like the lack of negative feedback for abusing people (more generally for exporting costs, esp. to the future), or the corruption of discourse that mediates agreements about governance. My goal would be to leave the world more free, peaceful, nature-healthy than I found it. Antagonism doesn't help for that, and side-tracks people into regressive emotions.