How do i apply the perfect foundation ?

well i've got a problem , i never put on foundation ! i actually do buy a lot but none of them worked ! i've got loreal , maxfactor , givenchy , mac , lancome , dolce and gabbana but its just that none of them works ! i dont have accne but the thing is that when i put on foundation , a weird thing shown on between my eyes and on my nose which is white and it looks really awful , as soon as i put on foundation this thing shows , well u might say that im stupid but i dont know what its called ! i did try ex foliating and used scrubs but it just doesn't work and i really wanna go out once putting on a foundation without looking hideous , any recommendations ? thank you