[wdfifteen]

Not connecting the engine to the transmission is the common behavior for a bad clutch. They seldom fail in such a way as the engine cannot be disconnected from the transmission. (though I have seen clutch disc lining get shredded and jammed between the pressure plate and flywheel) A merely worn clutch usually tries to drive the car. It drags enough to cause the gears to clash if you try to shift with your foot off the pedal but can't move the car. I suspect something more catastrophic:

1. center ripped out of the clutch disc
2. splines are ripped out of the clutch disc
3. since the pedal feels "funny" it could be something in the pressure plate


You are using the terms engaged and disengaged differently that most people use them.
"Engaged" means the clutch is connecting the engine to the transmission. "Disengaged" is what happens when you press the pedal to the floor on a working clutch.