I really was not keen on the lesbian lizard lady. That whole set of storylines, they did't make a lot of sense, and they didn't seem possible. Which seems like a weird thing, but if I compare it say to the first new episode, with the living plastic mannikins - that seemed plausible. Crazy alien plastic coming alive in modern London. I had a formative experience as a child when I tried to shake hands with a mannikin and the hand came off - that episode was the stuff of nightmares for me.
But lizard ladies and dinosaurs in Victorian London - that's the past, right? We'd have heard of that.
Pandering to the hardcore fanbase landed us with the Matt Smith era; overly-complicated stories written purely for geeks where the casual viewer had to wait to hear Smith's last-minute explanation to understand what the hell had happened in the previous hour.
I was a pretty dedicated viewer though not a "fan" I tuned in reliably every week. And I usually like complicated, even slow plotting, and plots that extend over seasons rather than being very episodic. But many of those episodes confused the hell out of me, and the series were very over-written, disappearing up their own arses. It seemed toward the end that they was nothing ever really new or different it was all completely self-referential, like a sort of black hole crushed it all down into a tiny speck.
I think I watched the first Carpaldi season and then I said enough is enough.