Some bold whataboutism - rather than addressing anything I've said you've simply gone ahead and criticized the US. Alright.

Second, gun violence, police brutality, and income inequality in the United States are not anywhere close to that of most developing countries. You need to spend more time reading about and traveling around the world if you think this is accurate. Corruption in the US is not even close to as bad as most other countries in the world - feel free to examine one of many international corruption indices. Student debt? People sacrifice everything in their lives to move to the US and help their kids acquire that "crippling" student debt.

I imagine that, in your head, you're comparing the US to other capitalistic countries in Europe, like, say, Denmark. Denmark is not a third world country.

Stating that "every country has its pros and cons" is nonsense for three reasons. One, it implies that every system is equal. They're not. There's a reason you see Chinese people moving to the US en masse and that you don't see the reverse. Two, it implies that countries are the right subjects of criticism. They're not, the systems of government and government policies those countries employ are subjects of criticism. You are absolutely right when you say that the Atlantic Slave Trade was an abhorrent and absolutely evil practice. No one is defending it - it is absolutely antithetical to the notion of individual rights. Three - and most important - it's an excuse to just throw up your hands and give up on trying to make life better. Nothing is objectively better than anything else so why bother thinking about it?