Did you do this in Trump's first term? During the 1/6 transition period? OR ---just the 2nd term when he got elected again?

Within a year of his first term. I already knew that we had elected a corrupt, unthinking, unintelligent POTUS. Hearing him ramble on with his lies and nonsense was just making me angry, so I tuned him out. My newsfeed filters almost everything he says ("not interested" is a nice feature of the Android newsfeed). The ignoring has carried on into his second term.

And nobody seems curious about why it happened.

I wouldn't say that. I think people are coming to incomplete or inaccurate conclusions. It's multi-faceted. There's not just one reason. It wasn't just "pronouns". It wasn't just "Comey violated FBI rules and announced an investigation". It wasn't just the Felon tapping into a base that people didn't realize was there (e.g. closeted racists). It wasn't just that blue collar workers didn't think the Dems represented them anymore. Etc. It was all of that, and more.