"Loser" is a mixed bag. The gameplay is a bit challenging at first, but once you got the hang of it, it´s ok.
The guards and robots are very alert, so some parts are not that easy.
What I didn´t like were the unnecessary references to nowadays politics. It´s not only that this is a rather divisive topic, but also not the case that a certain POTUS is not constantly targeted(often very derogatory), so the jokes are at best worth a yawn. The mission would have worked without that, too, so a minus on the story(which is kinda shallow anyway).
I also didn´t like the funfair style music in some parts which is a misfit in the Thief universe.
Later on you also have some trolly stuff in the gameplay, so be aware of that. What is kinda strange: It is possible to kill some mechanists without failing the no-kill restriction, OTOH the mission failed when bombs shot by robots killed some of them.

The end however is kinda cool, wish the whole mission would be on that level, which is unfortunately not the case.