Unfortunately all disconnections and game crashes counts as leaving the match and will be penalized appropriately. The game server has no way to discern a legitimate disconnection or game crash from one that is forcefully caused by a dishonest player to bypass leaver penalties. You can learn about this policy here:
If your console system is freezing up and crashing, this is very likely a sign of a serious issue with your console and you may want to reach out to PlayStation support for detailed assistance.