Valspar Paint Paint is worthless, doesn't cover!! Chicago, Illinois

I bought a gallon of valspar professional semi gloss in a marigold yellow to paint my kitchen, after 3 coats it is still not done or covering, it is streaked. I contacted Valspar by phone and they had me go back to the store and replaced it with the valspar medallion brand, and then I was told by the store valspar rep that doubtful it will be any better and to not be suprised, as yellow is a hard color to paint with!!!!!!!!! What kind of bull is that? I know that no matter what color the paint is it should cover if it is a decent brand. Valspar is a rip off and is a waste of money and time, so after 3 days maybe, just maybe I will get to use my kitchen again. This has been the worst painting experience of my life!