Do you tell t when they screwed up?

I tell my T when things bother me. It has always turned out positively for me.

I've had several incidents like the ones you describe, growlycat, where T said he'd raise something at the next session. He never remembers! He also is terrible at remembering to tell me when he will be out the next week--often he tells me halfway through a session that he'll be out next week. This is very hard for me and i finally had to tell him how much it upset me. Since then he has either remembered to tell me ahead of time, or admitted he screwed up and given me an extra session before he would be gone.

He admits this is a weakness of his and I try to roll with that. He's so good in so many other ways, and when I tell him his forgetting hurts me, I can tell he feels bad. I suspect he's not a planner or think-aheader and this is reflective.

Anyway, tell kashi. I think it will be helpful to you,

My t's all schedule one client per hour, and they almost always spend a full hour (or sometimes more) with me. Occasionally t2 will have a client before me run 5 or so minutes late. She apologizes, I say it's fine because I have gone over before (I am her last client before lunch).

I do tell ts when they screw up, but I think maybe my definition of screwing up isn't the same as yours, growly. I don't really leave things hanging with any but T1, and he always writes it down, and he always checks his notes from the prev session. I don't mind them being late. Or maybe I accept that pdoc and t3 are always going to run late and I can roll with that or stop seeing them. I choose to see them, but no point being mad about that (accepting the things I cannot change as taught in 12 step programs).

The occasional real screw-up, yes I do tell them about that. And they apologize. But that has been more than being forgetful or late. If, however, lateness or forgetfulness was a triggering sort of thing for me, I would tell them and I would expect them to take whatever measures they needed to remedy the situation.

And I would do as others have suggested: I feel hurt/anxious/triggered because ...

It's hard to do, but it has turned out well for me.

I think it is super important to bring up things that bother you, disappointments, errors on your therapist's part, etc.
In part because you are paying for a service. Would you tell yourself, "Oh, the plumber said he'd also fix the upstairs toilet and did not, oh well, I know he has a lot of clients and lots to remember, so I am just not going to say anything"?
But also because you are supposed to tell your therapist what is really on your mind and this is the only way he or she can really get to know you and what's important to you.
My most therapeutic moments with my therapist have been when I've talked with something that's bothered me about it and he's accepted it and accepted his part in it and worked to make amends.