Direct3D11 4x MSAA enabled - still looking bad

I'm rendering a elemental triangle utilizing Direct3D11 and I'm seeing a very visible staircase shape contempt enabling 4x MSAA pinch value level = 16 connected nan switch concatenation (I'm not moreover utilizing immoderate depth/stencil buffer astatine this time).

Question: is this really what I should expect, aliases americium I doing thing wrong? There's intelligibly immoderate antialiasing going on, but I expected it to do a amended job. Why is location a clear drop-off constituent forming nan staircase - shouldn't it beryllium smoother?

8x MSAA isn't looking overmuch better: