Should I leave my noisy duplex for a detached house with better privacy?

I moved into a beautiful remodeled duplex. However the walls are paper thin which is something the owner didn't share. The owner said the walls were insulated, lies! It literally feels and hears like the neighbor is in my unit. My previous apartment had better sound insulation. On top of this my neighbor is mentally ill and unhappy with her life. She doesn't like me for whatever reason and I've done nothing wrong to her. She creates excessive noise. I'm wondering if it's best to move and find a detached place?

Updates
2 mo
I can't even talk on my phone or sleep in the main room connected to her wall because she's so nosey, noisy and it's uncomfortable.
Should I leave my noisy duplex for a detached house with better privacy?
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