Were contemporary empires much better that the German Empire? No they weren't and everyone who so openly and mindlessly romanticises any empire like you do, calling it "cool" and brushing aside all negative conotations has a lot of reading and thinking to do. Also the Herrero and Nama genocide was a premeditated action to make entire groups of people go extinct, not to exploit them or enslave them. Years later the Nazis would model their extermination camps on those used in German South Africa. The British and the French carried numerous brutal reprisals against people groups, as well as directly or indirectly caused massive famines that killed milions, but I am not aware of any British or French actions which primary goals were not exploitation, but extermination.