So, let's talk about camps..
It's become common parlance to use the term "concentration camp" to describe all Nazi camps, but this is not actually true. Nazi Germany had two kinds of camps, concentration camps and extermination camps. The former can be found all over German occupied Europe and housed all kinds of people the Nazi regime did not like. While these people were treated badly and often subject to deliberate starvation and extermination through labour, the goal of the camps was simply as a place to dump people who were seen as political or racial enemies of the state.
Extermination camps were not concentration camps, although the issue is confused by the fact that some extermination camps were either attached to concentration camps or were actually many smaller camps with different roles (like Auschwitz), and that many extermination camps were disguised as concentration camps to reduce resistance. Extermination camps had gas chambers, they were specific facilities designed to kill people and dispose of the bodies as quickly as possible, usually thousands at a time. They would often house a few prisoners as slave labour, but only enough to keep the camp running, and thus you didn't have housing.
The extermination camp is a particularly Nazi innovation. There are things like the Killing Fields in Cambodia or Japanese medical research camps which served a similar function, but only the Nazis seem to have really embraced this idea of an industrial process of killing people as quickly as possible. If your definition of a concentration camp requires gas chambers, then there has never been any other instances of a concentration camp.
But then, that's a stupid definition of a concentration camp.
Concentration camps are a British invention. They were used during the Boer war as part of the British "scorched earth" policy of denying resources to the enemy and quelling guerrilla activity in occupied areas. Thousands of Afrikaners (and indigenous Africans) died in those camps due to appalling conditions, but killing them wasn't the purpose. Containing them was the purpose.
That's what a concentration camp is. It's a camp where people are detained for political reasons. People don't have to be being deliberately killed for it to be a concentration camp (in fact, if almost everyone in the camp is being deliberately killed, it's specifically not a concentration camp).
Maybe instead of quibbling over words, sit and consider the ethics of large scale political detention at all. Because people always get hurt. People always die. You cannot imprison thousands of people in a camp and expect them to thrive. If that causes you guilt or discomfort, lean into it.