It's still bad, but my understanding is that following the revolution there was compulsory military service, and those who couldn’t (weren’t allowed) to serve in the military had to work in the UMAP camps instead. That included gays, who were mistreated and discriminated against in the camps. At some point Fidel went himself to the camps undercover and witnessed that, ended up shutting them down and later apologized. Still bad like I said so I don’t want to come across as making excuses for it, but a lot of libs like to say that Cuba was uniquely horrible to gay people (I mean comparing it unfavorably to the US etc in that regard) or even say stuff like “che Guevara killed people for being gay” so I think it’s important to examine the real details of what happened.