I can recommend to arrange furniture in a way so that the corners coming into the rooms from the bathroom and other places aren't visible(bookcase at the place where the corner ends and the wall begins, so there isn't a noticable corner for example).
If you can't do that, at least make some way so that they aren't sharp, One way would be styrofoam, set it on an angle so it smooths out the corner, with some tapestry with pattern on top of it they can blend into the wall in a good way.
This is very difficult to explain in a forum, even though it would have been very easy in real life. Basically, make sure there aren't corners coming in from the walls.
For the rest, we would need to be able to look outside, can't make changes out of context. But even then there is a lot more info needed, directions, year of build, history etc. At least for me, other members may be able to do something with the present info, I know in other forums some members answer stuff only by blueprint, so there are options, but this is what I can recommend so far.