Rough idle and I have to press on the gas to start

So I recently bought a 2010 Chevy Malibu and at the time it
drove fine and felt like a new car. But here recently the
throttle position sensor went out so I replaced that and
after a week of driving it's hard to start and idles rough. It
shifts hard sometime while driving on the highway. I
replaced the mass air flow sensor, and the whole throttle
body assembly.