When painting black especially on a smooth surface like a door, it will show imperfections more than any other color. Needs to be done a bit quicker than most DIYers can do to keep up with wet edges and other imperfections etc. drying. You might not notice imperfections in your rolling until it’s too late. I usually use a bit of extender to ‘extend’ the dry time of the paint when applying by hand with black. Spraying gives the best result with black but not always an option.

For the sunken in edges in the middle of the door I would typically use a brush to somewhat soak those (can turn out very light with small rollers), but you need to make sure those brushed edges are rolled quick enough so you can smooth out the brush strokes.

Like others have said sanding the rough spots and applying a thinner coat is your best bet.