If we need to blame someone for load management, blame Popovich for introducing.
It wasn't noticed a lot during his time because Spurs had a lot of players they can rely on, with the Clippers, it was only Leonard which is his star and people are coming to watch him and without him playing, Clippers would be a different team.
Actually the lose was to be blame with the locker room problem clippers is having as of the moment. I don't know if that's true but there is a problem between their two stars PG and Kawhi with their loses on Hawks and Nuggets.