It seems that Yoseph completely changed the system of government from one where citizens had land rights and minimal taxes to one where the right to property was taken away and 20% tax.
He basically enslaved the entire population of Egypt.
He also forcefully relocated every single family in the entire country, something that would be extremely demoralizing and traumatic, specifically to stress the point that they had no property rights.
According to the Gemarah in Chullin brought by Rashi, he relocated the entire country to prevent his brothers from feeling bad and this is considered a "good" thing that he did.
Why is that praiseworthy? It seems almost evil that he would place the feelings of his family over the traumatization of an entire populace.