

Why would I vote “strategically”?
Because our (deeply flawed) voting system necessitates it to get good outcomes.
What you should be doing is pushing hard for your 3rd party of preference to run (and win) elections on the local and state level, not the presidency. You’d see far more actual, tangible change if you started getting those folks elected in smaller elections than just losing the presidential election with 2% of the votes every 4 years. Look at Zohran Mamdami - he’s doing a great job in NYC and actually doing a lot of positive things. If he’d run for president, do you think he’d have won? Not a chance in hell.
However, once candidates like that start doing good things at the local level, then they become more palatable candidates to elect to the House / Senate. And once we start getting Senators / House Reps from those parties, they become more palatable candidates on the national level.
Let me put it another way, using your logic: Should I blame you for my candidates loss, since you voted for Harris instead of my candidate? Should I say that Trump only won because of people like you not voting for my candidate?
There were exactly 2 candidates who had a chance of winning that election. You know that. Pretending otherwise is disingenuous. See the above for how to change that.

Great! So the next step, then, would be to push those candidates into senate / house seats, while protecting the presidency from the candidates who are interested in a fascist takeover of the country and its voting process, because that isn’t going to help your candidates get elected anywhere.