[Measurement Check] Calculator said 34FF/G UK, Currently 36D US, always popping up over cup edge, wires feel too far back?

At the point in my life of 31 years where I am so done with bras not fitting and/or feeling like I'm wearing a medieval torture device. No bra looks good under clothes, especially tight fitting. I appreciate any help <3

• Measurements:
  • Loose Underbust: 89 cm or
  • Snug Underbust: 85 cm or
  • Tight Underbust: 82 cm or
  • Standing Bust: 106 cm or
  • Leaning Bust: 112 cm or
  • Lying Bust: 105
• Shape:
  • I THINK I am kinda in between FB 2/6 and Even 2/5
  • I have tall roots (I believe)
  • Not sure about root width, might be average?
• Other Info:
  • AFAB
  • No surgeries or pregnancies
  • I've been told I have "tuberous breasts"?
  • Not surprised that my calculated size is much different than the size I'm wearing now as no bra has ever fit me comfortably besides a supportive sports bra.