2011 Chevrolet Equinox

Mechanics special, car has issues I bought this for my kids in September and have only put 2,000 miles on it, I was told it only needed an O2 censor well that turned into, all New upper and lower catalytic converters upper and lower O2 sensors, exhaust manifold, throttle pedal, throttle body, fuel injectors, fuel rail sensor, coil packs, spark plugs, timing chain, fuel pump, and ECM, car will need to be towed, it starts and goes into drive and reverse but starts to stall out after 10 minutes, I am not a mechanic so i have thrown enough parts at this car and watched youtube it’s someone else’s turn or take it to a shop. I have no idea what it could be, I paid $4500 for it and have put $4000 into it I know i will never get that out of it so I’m asking $3,000 obo Small dents in quarter panels, no rips or stains on inside