Get the stairs retiled and now the step is too high

Wrote to the tiler and described the things that worry me and whether he has any idea how to improve them. Let's see what he thinks.

I remember that you are very knowledgeable about tiles and floors. What would be, from your point of view, a possibility to still save or improve something here?

I had now written to the tiler that I don’t have a good feeling about the raised edge but also that the stainless steel strip at the edge of the stairs stands too far above tile level, so that the water cannot drain. I asked if he has an idea how to improve the situation. He wasn’t interested and said I’m just looking for a reason not to pay. What?? I mean, it’s not like I have already paid more than half. On Monday, the tiler I trust will take a look. Maybe he has an idea.