In Jain tradition, Krishna’s world was not preserved as an ideal civilization. The Yadava dynasty and Dwaraka became destroyed through internal conflict and great violence.

In Jain scriptures, Krishna is understood as a Vasudeva, and his era is part of the general decline of the world cycle. After that time, society entered a more degenerate stage of the Avasarpiṇī cycle, where dharma, restraint, and virtue keep decreasing.

So, in simple words:

• Krishna’s kingdom fell
• His clan was destroyed
• His age became part of the world’s moral decline
• It is shown in Jainism as a reminder that power, wealth, and victory are temporary

If you want, I can also explain Krishna in Jain scriptures in a simple Jain way.