I'm absolutely open to the argument that Jani has does something wrong, but nothing you've said has really even accused them of anything.

If you want to define doxing narrowly (as it was historically) then I would agree that all (or nearly all) such cases are wrong, but this is by no means clearly doxing. If you want to define doxing widely (as is common lately), then I'll accept this is clearly an example of doxing, but note that there's nothing inherently wrong with doxing.

Just saying "doxing" does not establish that the underlying actions are immoral, and so it does not follow that the target not appreciating it is relevant. If I take the last parking place in a crowded lot, the driver behind me certainly won't appreciate it, but I have no obligation to give it up. If you think Jani has done something incomparable to taking a parking place, you need to make the case.

We called this exact pattern of behaviour "doxing" on IRC in the early 2000s, I really don't know why you think I'm using some new definition.

It's probable that in the later 00s this would have been called a "faildox", but it's still just a fundamentally dick move to try to identify someone online who doesn't want to be identified. It doesn't matter if you do a completely shit job at it.