You Didn't Tell Me the Start of My Transmigration was a Gate

I closed my eyes after fighting in the final battle. That should have been my peaceful rest. But when I opened my eyes, [Notice: You have entered the gate.] [Verifying user.] [Entity 'Hanseoha (Awakened)' identified.] [Connecting to the system.] I was in the worst gate that took three years to clear. "Food, drink, weapons, and all the necessities for survival. Take everything. Canned food as a priority! Lighters and things that can be burned." I must escape this gate first, even if it means returning!