Not holding a charge could be a dead battery cell. Check the voltage from the alternator, it should be about 14.5V

As to the no torque, it usually means that you are not getting enough air or very little spark energy. In either case, you are flooding the cylinders with an open throttle and the engine boggs down. The tranny kickdown is good, it is doing what it should.

Check the air hose from the throttle body back to the air cleaner for cracks or loose fit.

A clogged CAT is a possibility but hard to diagnose. Sometimes banging on it with your fist, when it is cold of course, will generate noise that doesn't sound right.

Klaus
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Praying for Cynthia Amendt, heaven bound