Desktop development
.NET sucks, QT sucks, GTK+ sucks, Java Swing/FX sucks... it all sucks! All these frameworks are either a bloody mess or so outdated, they make HTML5 look like the best option for developing desktop applications... I can't even tell if that is good or bad, I'm so disillusioned with it all.
In any case, it is beyond me why anyone would take the time to get their heads around any new development framework MS comes up with... think of all the man hours wasted getting up to speed with Windows phone app development... what a worthwhile effort that was!