No, you're not understanding what an oxymoron is. An oxymoron is a figure of speech where two contradictory or opposing terms are put together, like "jumbo shrimp" or "deafening silence."
In the phrase "survive just fine," the words "survive" and "just fine" are not contradictory. "Survive" means to continue existing or to endure a difficult situation, and "just fine" means adequately or without problems. Together, they suggest the organization will continue to exist without serious trouble, which is a coherent and logical statement—not contradictory.
> I think I understand what an oxymoron is and does
You clearly don't, or you wouldn't have mistakenly thought that phrase represented an oxymoron.
> "The Air India flight 171 passenger survived just fine after visiting the hospital."
No need to introduce a completely arbitrary sentence in some attempt to justify your mistake. Just accept that you were wrong and try not to make that mistake again. It's easy.
Survival indicates struggle. "Just fine" is the opposite of a struggle. Literary tropes are not black or white. Give some freedom to the readers of your comments.
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