OP- You probably already know, but.. If you do the right thumbwheel press, you can quickly give a verbal bug report of experience. Although, I don't know if that works the same in all areas of the world, or how much attention to those bug reports receive from support/engineering.
In the USA, unless you buy off menu SR, you are forced to only have TACC / AP.
(...not even sure that regular SR has true 'dumb' cruise control anymore, as I've seen people complaining of strange slowdowns, presumably caused by hills/grade changes in their SR, on reddit.)
Anyway... Even when you disable the hot garbage that is AP, you still have the same TACC, with all the random phantom braking and unwanted speed changes that come along with it. Even when I literally begged the service center staff, they would not disable TACC on SR+ or above trim level. Therefore OP's gripe is correct, owners are forced to only have 'beta' cruise control on nearly every Telsa ever sold in the USA. IMHO, it is 100% BS. I want a thing that works correctly, at the speed I chose, every single time I use it. TACC & AP cannot deliver on that yet.