I don’t know what has happened to leagues around in last couple of years because I haven’t watched any football from other leagues.
However when I used to, I found every league to be massively boring compared to PL. The speed of football, quality of players, dull commentary, Seria A & La Liga coverage never used to be bright making it even more dull on top of their dull environment.
Over here, no other league gets the punditry treatment over half time or between matches, something which makes PL a bit more time exciting.
PL just has all the elements right which makes the viewing of even crappiest teams pleasurable. They have a great marketing team.
That said, there was a massive element of lack of interest in other matches due to absence of Arsenal. So It is difficult to be rational.
For me, Viewing interest goes down as follows
Eredevisie (something romantic about that league)
This is not league rankings rather just which leagues I happen to enjoy watching. Completely subjective.