We're arguing two different things. I'm talking in the macro, you're focused on the micro. Note I'm not saying your particular critiques are wrong, just that I'm pulling back to look at it further than you are.
And anyone that was to do what Bill Gates did to Jobs today, would likely end up dead in court, yet he (along with jobs) is largely seen as the messiah of personal computing and American ingenuity.
He literally created entire industries (or at least in some people's minds) and was a rather large and untouchable thief and scumbag on the whole.
My point is, people tend to gravitate away from the bad in an influential person, and Paul, whether or not you like it, was very influential. Don't let the vocal minority of conspiracy theory and American haters (which populate the living shit out of the left too, so there is nothing new here) drown out the vast majority that look at him as someone who didn't really toe the "wrong lines" that the typical establishment politician does.
He was Bernie Sander's right, except a fan of freedom over government control. Complete with the similar dark history in his writings.
I think you're sort of deluded if you think Libertarians can actually do anything but catch a couple house seats or dominate a small town legislature.
They spend far too much time arguing who is more libertarian than who, and who can be the closest to anarchist without going full AnCap.
Then their is the problem of AnCaps...
All liberty needs is an introduction, it doesn't need a face, spokes person or idol. It's the truth, it speaks for itself.
Paul introduced it to millions of people who previously thought "ban what my party doesn't like, make what I do a right" was the one true way of politics. Whether or not you like it, this happened. Whether or not you like him, he did this.
The libertarian philosophy will not likely die any time soon, and can be seen in streaks and shadows within both the major parties. The Libertarian party could have Jesus Christ himself as a spokes person and still not gather 35% of the vote.
There will be no "good developments for the Libertarian. For the libertarian however, Paul was just an imperfect messenger that "got it". Doesn't mean he was always right, perfect or anything of the sort. But to downplay the impact he's had so far, and how that will manifest isn't really looking at the big picture.
Again... He is batshit in a lot of ways, no doubt. That doesn't mean what he did wasn't influential, and in some ways very good.