This ergonomic seating diagram has 90 degree angles that look like 120 degrees : r/CrappyDesign
Office Desk Chair, Ergonomic Chair With 90° Flip-up Armrest & Headrest, Adjustable Height, Swivel Computer Chair With Lumbar Back Support 360° Rotation Gaming Chair(White Frame+Pink Mesh + Headrest) : Amazon.co.uk: Home &
VEVOR Office Chair with Adjustable Lumbar Support, High Back Ergonomic Desk Chair with Adjustable Headrest, 2D Armrest, Ergonomic Office Chair Backrest, Computer Chair for Home Office
BEITH Ergonomic Office Chair, Desk Chairs with 3D Two-way Adjustable Headrest, Elastic Waist Support Double Back Chair, 135° Backrest Tilt, 90- Degree Rotating Armrests, High Back Computer Chair : Amazon.co.uk: Home & Kitchen
Office Desk Chair, Ergonomic Chair With 90° Flip-up Armrest & Headrest, Adjustable Height, Swivel Computer Chair With Lumbar Back Support 360° Rotation Gaming Chair(White Frame+Pink Mesh + Headrest) : Amazon.co.uk: Home &
Office Chair, Adjustable Backrest and Armrest with Lumbar Support Black - Martunis Office Chairs