I only partly like some of the newer Doctor Who series. They are too hyperactive and hand-wavy for my tastes, especially because I know and like the slower-paced original series.
And yes, not only is the science BS, but it’s also not very compatible with the pseudo-science-fantasy continuity from the original series. I think the original series’ version of made-up science was more interesting and/or charming, and had more to it, while the new version is far too often “wave a sonic screwdriver at the problem, and almost any problem the current writer wants to be solved will be solved in one second”.
I quite like the original series, particularly the ones with the third and fourth Doctors (Pertwee and Baker), as I think they had the best writing and humor to them, though I also like the first, second, and fifth doctors, and I’d take most of the 6th and 7th doctors’ episodes over the modern ones. I do enjoy much of the acting and many of the ideas in some of the new series, but the pacing and the reduced intelligence and continuity, are problems for me, and I only watched episodes with someone else who wanted to watch them (who also gave up wanting to watch them, because of the lack of intelligence and continuity).