There is no research to support the claim that antidepressants cause permanent brain damage. SSRIs, work to block a reuptake process. That's really all they do.
Antidepressants work on the neurotransmitters that are responsible for, symptoms such as sleep, appetite, mood regulation -- and it's not as though you are taking neurotransmitters -- you are taking a medication that block the reuptake of your own neurotransmitters.
Not everything you read on the internet is written by professionals; if you want research based, peer-reviewed journal information -- you have to read the journals, otherwise, I'd ingore most of what you read on the internet.