Hi Kyokushinfighter78, here's my 2cents
Being cornered by multiple opponents is like being submitted by choke/lock (armbar etc).
If a solid choke/lock already applied to you, even you are a BJJ blackbelt, it will be hard to escape. The choice is only to tap or snap
So, escape before it happens.
For choke/lock, escape before it sinks completely.
For multiple opponents, run away (if possible) before get cornered, dont take that chance. If run away is not possible, so....I guess....just tap out
Ery