It's time Cal moved on, and I think he sees that himself. He just has "that look", the one that says "OK, It's been over 10 years here, and it's worn me down."
Between the virus, his 5 stars playing like 2 stars, and the backlash he's getting over his politics, has finally gotten him to this point. I don't think he gives two chits what we think of his politics, but I do believe he felt he was above reproach, and was therefore a little shocked with the blow back.
Now he's being unmasked as a very, very average bench coach, and us peasants are unhappy with his results. I think he's gone, on his own, after this season. I think it would be best for both parties.