It's very fashionable to bash colonialism and pretend that it was purely negative. Generally, this is indicative of feeble thinking.
There's also a misguided romance about primitive life.
Do these people realise that this was an environment where 30 would be considered a ripe old age? Where living much beyond 20 was an accomplishment only achieved by the few who didn't die as infants, or from an agonising death from what would today be consider minor medical issues, giving birth, infections, etc. Where finding food was a gruelling, dangerous ordeal? And you lived or died at the whim of a feudal leader?
There were no roads, solid structures for shelter, little entertainment, no legal protection from the principle of "might is right", no real healthcare. And while I'm sure that relatively speaking, many of those people lived fulfilling lives with loving relationships and family, would a single one of these vocal critics of colonisation give up any of the benefits that came along with the evil colonialists?
Of course they wouldn't give up all the benefits of colonialism that they enjoy today! They are supreme hypocrites, using western technology to relentlessly bash the west. They instead propound the ludicrous delusion that primitive societies, who had yet to invent writing, and in many cases the wheel, would somehow have developed their technology to the same level as the west if only they had been left alone. (And perhaps this is true - given another 10000 years). Or they revise history and make preposterous claims about how they really developed all the science and technology that the west stole. They point at a few stone walls in Zimbabwe and claim that this is evidence of some great African civilisation rivalling Wakanda.
It's sad, really, all this living in the past. Look at what has been achieved by those former colonies whose people embraced commerce and pragmatism and industry without wallowing in perpetual victimhood.