By every metric the empire made the world it ruled worse.
First of all, trade is the primary spreader of culture and technology. Not empire. The British empire held back this.
The Indian Ocean already had a thriving trade network. The British destroyed it.
After the empire left, these institutions would often be destroyed.
If you deny this you might as well deny the earth is round. History is not up for opinion, this is a historically scientific fact.
I'm gonna start looking for people talking about syphilis and talk about how actually it's not so bad and a ton of diseases are also bad actually because *promptly shits myself*