IRV is a terrible system, I know in another comment you said it was your favorite, but it's almost as bad as First Past the Post, and actually worse in a few areas.
And seriously, Later-no-harm is meaningless. It's basically a "did you vote for this person? They might win". It's like, no shit, that's how elections work.
If you want an actual issue with elections, look at the Monotonicity criterion. IRV fails this one. You can actually almost guarantee your most hated candidate wins, by voting for your favorite in the first round.
This brings up the issue of ballot exhaustion again. If your first round pick survives multiple rounds before being eliminated, your ballot suddenly doesn't have any valid candidates on it. This means your ballot might as well have been empty.
If you had not voted for your favorite, your vote could have gone to one of the others and helped them win, instead no, all that information about your preferences is just thrown out because of a stupid, arbitrary rule. If every single voter puts Candidate B as their second choice, Candidate B has 100% approval, and yet, under IRV, Candidate B is the first eliminated.
Another issue. Ranking candidates in order tells us nothing about how you actually feel about them. We know you like number 1, but number 2 could be anything between Jesus and Hitler. There's no information there, just that you like them less than 1.