Is there any taboo in not having the living room window in the middle of the entire wall? Is there any taboo against having the right door frame of the entrance door almost facing the left door frame

No taboos. If the entrance door is facing the kitchen door, it needs to be improved, but the situation you mentioned cannot be regarded as "directly facing", so there is no taboo. The location of the window is not a problem.

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Hello. Your picture doesn't explain anything at all. I don't understand what the horizontal lines are. There aren't so many small rooms, right? The lower left is the entrance, and the one in the middle is the bathroom? What is that long line on the left?