I'll give you a summary...
OP got on the bus with his wife and kids, four year old and eight year old, right after Happily Ever After. No wait, but it was standing room only. The OP started looking for a seat for his wide and four year old and spotted a group of 20 somethings two men and two women, decided that they looked young and healthy and could stand, and says loudly to his wife, "Well, just ask them if you can sit down." Then he gets closer to them and confronts. One of the women says, sorry, no, I'm falling asleep on my boyfriend's shoulder here. The guys just ignore him. No one gives up their seat for the kid. The OP waits until they had gotten off the bus, and then, hoping for an altercation so he could punch one of the guys (the OP said that in the post) reams them out and they just look at him "stupidly" as the OP put it and walk away. Then the OP goes into a rant about how all 20 somethings are rude entitled brats who were raised poorly and a reminded to all to raise their kids better than that and to always give up a seat on a bus.