Well you definitely sound like one when your first sentence is "this is such a garbage attitude". And no, I never said I would do anything, no matter how immoral, to avoid taxes? But you can carry on if you want.
But yeah, it does make me angry and I have a fair bit of sympathy for socialists of which I am definitely not one when they get angry about this kind of thing. Rather more than for tax dodgers claiming "it's not actually illegal so no moral judgement can be made." But that's not you despite what you wrote as you've now clarified.
> "Why on earth wouldn't you legally avoid tax if you could"
You evidently have answers to this question yourself as indeed we all should. Once there, there is plenty of room for discussion and debate.
We /are/ on the same page because now you've moved from ethics free argument to one involving your version of ethics. Plenty to discuss there, that barely scratches the surface and any deeper is likely a waste of time.
There is a huge difference between genuine libertarian belief an just being a "tax karen" with a pretence libertarian justification. The only thing they really want is not to pay. The latter have really messed up libertarianism and that's a pretty big loss. Including in our tax bills if we can't or choose not to avoid it all.