This was year 4 of not making the playoffs. 5 years ago we lost in the first round with a team led by DeMar DeRozan and a 33 year old LaMarcus Aldridge. I think Pop did fine with what the GM gave him to work with that year.
4 years without playoffs is about right for the talent we have. We got stuck for a few years in no-man's land, with mid-to-low 1st-round picks and no real star to build around. This year the franchise was 100% in on the tank from top to bottom. So really Pop can (possibly) be put to blame for 3 years of playoff-less basketball....... but if you want to make the argument that he's at fault for the performance of this young team without A-level talent, go for it. But be sure to name someone who can take a team without a Giannis, Tatum/Brown, Ja Morant, Jokic, Embiid/Harden, Booker/Durant, etc. to a Top 4 seed. Only the Kings have come close, but they also have 3 top-10 picks on their roster. We need that type of talent first.
TLDR: Pop don't need to go anywhere. Blaming him is silly.