"End of suffering" in Buddhism as far as I understand it, is not about ending pain or hardship altogether, but finding a better way to deal with them. Undergoing them more stoically, being more resilient to them.
"Nirvana" as the endgoal is also a bit iffy, it has been interpreted in a nihilistic fashion, as "escaping existence", but I think that in Theravada Buddhism it is seen traditionally as extinguishing the mind's greed and hatred. In Mahayana Buddhism nirvana has another role than in Theravada, because of the Bodhisattva path whereby the practitioner foregoes nirvana in other to help other sentient beings.
I sort of cherry pick Buddhism, I like bits of it, other parts I abhor, especially some interpretations of karma. I am agnostic about the whole rebirth thin.g