That's not a logical argument at all but okay.Unpopular opinion, but I don't find Bojack to be well written at all.
Case in point, the episode with no dialogue was the best that show had.
That would be my answer. There were times where the Cartoon Cartoons (Dexter's Lab, Powerpuff Girls, etc.) were amazing, but many of them fell off or were remade much worse.
I'm guessing Tuca and Bertie is just a little too new to have much of a mainstream following compared to, say, Bojack