Its not just bulldada, in fact when the budgets sucked it had some of the best written sci-fi stories,
Sure every episode was the same quarry with a different colour filter over the camera lense each week, but that quarry gave us stories like Genesis of the Daleks which is A-Grade storytelling.
Also Douglas Adams was the show writer for about two years in the 70s and those episodes are still slick stylish and funny, his best is probably City of Death and is a fun counterfeit art story set in 70s Paris and renaissance Paris.
The show has never had consistency, Its as strong as the individual writers of which there are scores. You get the good with the bad. The bulldada episodes like Face of Evil when they had no money had to get creative and have hilarous thungs like tom bakers screaming head following the cast around a forest.
The main problem with the new show apart from condescension is the melodrama, the show is strongest when its exporing a sci-fi concept and not moaning over the doctor wondering if he doing the right thing.