From my perspective, it seems as if the PVP population is steadily shrinking.
I used to really enjoy PVP but for atleast the last year my frustration with this game mode has increased.
I am losing interest in the game mode because as it is now, I do not find it satisfying.
Some of the reasons I have seen others say made them leave PVP are:
Have you quit, or drastically reduced your pvp game time?
Have you avoided this season because of the horrors from the last two?
For me (meaning my personal opinion and experience), I find that the lack of a strong and important competitive scene in Guild Wars 2 demotivates me from playing other game modes in it. I become so frustrated with the game when I am in PVP that any other goals I may have set for the day are abandoned, because I log out in disgust.
I percieve that the PVP population is shrinking due to alot of well known, yet unaddressed issues. PVP is a core part of my GW2 experience, and PVP's current state demotivates me from playing the rest of the game.
Soon™ ( ͡° ͜ʖ ͡°)