Fallacy accusations.

No one needs to waste their time with someone else’s invalid reasoning.

Some of them being also kind of subjective.

Logicians & philosophers would disagree. Fallacies clarify identifying common reasoning errors & save effort overexplaining clearly documented problems.

Was this a valid example or was it a strawman?

Strawman means claiming to refute an argument by instead refuting a misrepresentation of it. Unclear how a question about examples would arise there unless the definition wasn’t understood.