I've had the same thoughts when my T rescheduled me or ticked me off. Like when he suggested cutting back on the number of sessions. But then I figure, he could care less whether I'm there or not so how is it hurting him for me not to show up?
I'm still the one getting screwed and all he gets is more time off and a passive-aggressive slap in the face to show him I'm upset about his scheduling.
I know it's natural to want to hurt him back, but is it really going to do that? Try showing up and telling him you're not happy with the scheduling lately or the upcoming scheduling problems and what can he do to make you more comfortable with that.
I say, suck up the anger and ask for what you want. Good luck!