BMW 320i ,models 2012 are the disappointments

I bought a 2012 BMW 320i sport,that was fitted a new engine in 2017 the same year I bought it.This year in March starts being problematic and I dont what to do with it any more.Im so disappointed with brand and I'm not the only one who complains with the same car 320i.People telling me I should have bought a 320d cause they are less problematic than the one I own.I wish could return it or sell it the way it is if I wasn't paying the car.I got sick of stress because of the car that I trusted so much.Now I have lost trust and hope in the brand.I know the company won't do anything I'm stuck with problem I was void voicing my concern with the car.The owners of E90's are not complaining but F30 petrol 2012 are so so problematic sheim on them.