Trying to understand why will cause you even more pain. My advice: treat it as a funeral/loss of a loved one. The time has simply come. Do your mourning and move on. Dwelling on it will only cause my pain and reopen old wounds.
I bet legally, the establishment owners aren’t required to give “service charges” to their staff the same way they are required to give 100% of the tips…
This is some shady shit, IMO.
Disclaimer: I’m not a lawyer (so I don’t know WTF I am talking about), so if someone here that knows the law could comment on “service charges” vs. “tips” in this context, I would love to know.