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.