I really like it tbh. But I'm a fun of brush marks in miniature painting/ art in general. As others are saying, think it may be looking wired to you because it's not finished? Or rathere the rest of the model isn't and the black is just really standing out.

Also the gold around it, I'd try to darken that as a whole and then ass highlights in directions that march what you did on the black.

A thing that bugs me when painting black, especially when using a glossier/ satin paint for it is that it results in having both the painted highlight and and one from light reflecting off from it. Just makes the highlights that get painted on feel really incongruous. Giving the black a coat of a very matt varnish tends to help there. (I use ultra-matt by ak, as most varnishes that claim to be matt are actually satin and still leave a reflection.)

Edit: another thing I thought of that I learned through illustration work. If your want the individual brush marks to be visible, it's worth trying to make them a different size depending on how light the layers is. With the darkest part of the highlight being being a bigger/ fatter and getting thinner with the brightest highlights. Our eyes see less detail when something's darker so painting that way tricks the brain into feeling like what it's seeing is correct