A plethora of crap

I have a 2013 Chevy Malibu LT, and have had
nothing but trouble with it.  It started with a rough
idle problem, and when I had the codes read, it said
the camshaft position sensor needed replaced, so I
replaced it. Still had the same issue. That was a
year ago. I have since had the throttle position
sensor, mass airflow sensor, variable valve timing
solenoids (both intake and exhaust), ignition coils,
ECM, and the entire exhaust system replaced and it
STILL has the rough idle issue, plus the brake pedal
is stiff, it's losing copious amounts of oil with no
sign of a leak, losing coolant with no sign of a leak,
the brake system is looking just fine but the pedal
is stiff and hisses and the engine stalls if you press
on the pedal too long, the fuel economy is reduced
to the point of nonexistence, and there is white
smoke coming from the tailpipe. I would junk it, but
I still owe thousands of dollars in the stupid car
and I've only had it two years. Someone tell me
something magical.