I just had the worst restaurant experience of my life?

I went into the restaurant expecting good food and some decent service. What I got was a lesson that not all people in the food service are capable of acting hospitable to their patrons. I had a gathering of family and friends over, but the hostess directed us to two separate tables. We then took it to ourselves and decided to move one table to another so that we wouldn't get separated. A waitress comes over and says that its restaurant policy to not move the tables. At this point a member in my group protested this and before we know it, a heated rift developed between the waitress and the person of my group. A separate episode followed where my brother wandered off to another table. My brother has severe mental retardation and cannot help controlling his impulses. As soon as he sat down on the table, I get confronted by two employees asking my brother to leave and of course, I've tried to get him off but he wouldn't budge. I explained to them the situation soon after the attempt and they agreed to let him stay. I heard them laughing in background when I tried to feed my brother. A few minutes later, this waitress with a bad attitude screams at me in Cantonese asking why I was sitting there with my brother. I explained to her like the other employees....I just arrrrgggh lost my temper. I can't stand service like this where the employees are so confrontational and act like they know better than you