Sould new windows look like this?

We have had new windows installed to replace the old sash type windows.
This is how the new windows look:

https://imgur.com/xwMHWal

The installer fitted angles on the outside of the window but only to the sides and the top, not the bottom. The end result is that there is a thick black seal along the bottom. It doesn't look very nice and I wonder why they couldn't fit an angle along the bottom. I know there is a slope along the bottom, but surely something could have been done.
Would appreciate input, thanks


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