all bosses are easy!
boss 1: keep hitting him
boss 2: avoid the boar then he'll throw a spear dodge it then pick it up, throw the spear he will be stunned once your health is low there are 2 bushes at each side, hit them then get health repeat the process
boss 3: get the fruit the crowd throws at you then throw it at the freak, once he is eating it hit him or it,when it is already running do the sprint jump repeat the process.
boss 4: keep hitting him then you can go RAGE once your health is low go at once to the dark room then get health, repeat the process.