What kind of pills has your GP been prescribed?A sharp corner will absorb and amplify high frequency vibration, causing irreparable damage at the molecular level, weakening the overall structure of the OS. Adding a radius to the corners will disperse this energy, strengthen the platform and significantly add to its longevity.
I feel like you tend to get used to it. I used to feel the same way when I was testing 11.0 in beta.I cant stand the messy curved corners on Big Sur. It looks like PS1 UI attempt at UI corners. Just me I guess. But its so messy - If they took the silly lines out .. anyways