From what I remember the episodes were basically like mini-heist films where the fun comes from seeing this clockwork plan play out.
The films *also* tend to be at their best when they're doing that, but megastar Cruise completely overshadowing the rest of the cast always got in the way of them being the ensemble films they should've been from the start.
It doesn't help that "Ethan Hunt" has to be one of the vaguest characters ever to headline a long running film series.
So yeah I wouldn't be surprised if Landau hated them. Peter Graves certainly did!