So
@anthony do you have any suggestions for how to handle an overflowing cup day after day when the stress reaches the breaking point?
There aren't any -- not valid suggestions, that is. An overflowing cup, day after day, like you outlined, is simply a breakdown in motion. Not if, but when. Depending on the level of overflow and the duration, will depend on the breakdown severity, whether huge meltdown for months or years, or death by suicide.
Nobody can function day after day with an overflowing cup. Normal people do not overflow very often. Their cup fills up, it goes down, it rarely overflows within a lifetime.
There is good reason why suicide, hospitalisation, medication and so forth are prone in disorders like PTSD, because there are no coping skills to maintain overflowing.
You have to stop the overflow by hitting the issues head on. People can sustain short-term overflow -- they cannot long-term.
People often think their cup is overflowing, when really its just full. Overflowing is melt down -- you are no longer functioning when overflowing.