>...it sounds like they did fix them?

Kind of to a point.

People get bathroom breaks, but those count against your rate, and people do sometimes get written up for taking them, although that's as much a matter of Amazon encouraging ruthlessness in management as anything. I know of one anecdotal story of a worker who was apparently written up for the time it took them to clean up after their own nosebleed.

In the FC where I work, the temperatures are definitely not pleasant, but HR insists we simply aren't aware of how perfect the climate control is.

I think it's one of those things that depends on where you work and who you work under.