A rambling piece that boils down to a poorly substantiated opinion.
Namely, the author is under the impression that the wikimedia foundation spends unnecessarily and that, because they raised more than they spend, they should reword their requests for donations.
I half agree with the last point although the author doesn’t seem to understand that a couple of tens of millions is not a lot of money for a foundation of wikimedia’s calibre.
As for the first point: the author simply assumes that the spending is unnecessary. This is at best substantiated with other people’s opinions. If the author had presented actual detail on the expenditures, they could’ve made an actual case. However, the absence of such detail gives off the impression that there is no real substance to this criticism