Those who argue that Phillip abused his powers point to several instances in which he used force to suppress dissent and maintain control over the colony. For example, in 1789, he ordered the flogging of a group of convicts who had been caught plotting a mutiny. He also used force to suppress an Aboriginal uprising in 1790, which resulted in the deaths of several Aboriginal people.
Those who argue that Phillip did not abuse his powers point out that he was operating in a very difficult environment. The colony was a new and unstable society, and Phillip was often forced to make difficult decisions in order to maintain order. They also argue that he was always fair and just in his decisions, and that he never used force unless it was absolutely necessary.
Ultimately, whether or not Phillip abused his powers is a matter of opinion. There is evidence to support both sides of the argument.