Um, yeah ... There are lots of possible ways to react to someone basically ignoring you, but smashing a plate on the wall (& good on you for cleaning it up!) would definitely rank much closer to "over the top" than to "middle of the road."
I'd re-up for some T time. Short-term maybe, if otherwise you've been fine. I'm especially curious why, if your initial impulse was to suppress the rage, did you choose to let it fly? Or was it a fully-free choice?
It it
was a conscience choice, why you rejected it may be important. If your unconscience made the choice for you, then I'd say your derailing already.
Just my take.
Roadie