[question] Weird situation with iPad 2,1 iOS 7.0.4

I'm trying to downgrade to 6.3.1.

Tools say this device is jailbroken, but there is no Cydia on the home screen. Opening cydia:// in Safari opens Cydia briefly, then the screen tears and turns itself off.

Tried to jailbreak it with some tools but it says already jailbroken, pangu doesn't seem to work, evasi0n7 doesn't work either (even with tutorial on this sub's wiki, all of the envis0n7 files linked are for iOS6).

Tried to reset the device but all tools require Cydia or reinstalling 9.3.

Any working methods in 2023?