The light should be centred over the sink, not the countertop, unfortunately.

I tried a new light. Better but not perfect. The square light has about an inch of adjustability. More is possible but will require some creativity.

It's better the shape helps. If you can live with it , it's not a big deal. The style looked better with the bathroom too.

Mirror is too small also

Plus, the vanity light is installed too high.

The long base Cynthia Taylor Luce suggested is the better idea. Alternately, you could build a cornice and install recessed lighting.

or get an electrician to move your junction box.