Unhappy client

I bought a Nissan magnite and ever since I bought this car I have not been happy. There are always issues. Yes the staff is very nice and always helpful but having to go back to a store to get something fixed every-time hurts. I spoke to the manager today and he said I can pop in anytime to fix the current window issue I’m facing AGAIN. Why sell me a car which always have issues? What will be next? My car is not even 1 year 5 months old but how many times have I been to Nissan to get something fixed? I really need answers to why you sold me a car that is falling apart