I just want working RCS messaging

I’m in over a month now with non-working RCS on my iPhone 15 Pro. Apple blames the carriers, the carriers tell me it’s not them (mostly T-Mobile since I have good contacts there). They tell me they can’t really do anything about iPhones not working on RCS, go back to Apple. This is what it looks like: In short, it’s probably Apple or Google and there’s zero accountability from Apple. I have…