I can see my lampooning of the sarcasm tags backfired and my sarcasm was taken seriously because I didn’t use tags.

See, no tags. I can’t tell if you are explaining something to me or calling me a moron so I have no choice but to assume you are trashing my existence

We need disclaimers and tags to receive humor. Without those everything must be interpreted as negative-serious and most importantly malicious. For joking you would use /j and serious /s