Why are things breaking up in lord of the flies?

The boys society is breaking up because Jack feels that Ralph is not a good leader. Jack says that Ralph just gives orders but he would never get up meat. And Ralph blames Jack for many things like not making fire, shelter and stuff causing jack to hate Ralph. So Since jack feels Ralph is bad leader, he votes for a new leader but others don't agree with him. So Jack says hes gonna make his own tribe and his hunters go with him, and so do a few others because they are scared of jack since hes scary and violent.

So basicaly jack doesnt feel like Ralph is a good leader so he makes a new tribe and people join jack because they don't wana be against him since hes so violent.