34G here waves I get it, some clothes we just can't wear, they make us larger chested women look matronly (hello Hattie Jacques) whilst other things make us look positively indecent.
And we can end up with bad posture from lugging the clumsy meat bags around the place. Don't get me started on the walking jiggle or inappropriate nipple peaks. And yes, it's utterly bizarre and rage-enducing that some men feel they have the right to comment on your body. They can FTFO.
But I'm pretty sure nearly everyone has body parts they wish were different, smaller, bigger, firmer, fitter. Many of us hanker for a shape we are not or clothes that we can't quite carry off (boho blouses ALWAYS make me look like a matronly Carry On support actress. Won't stop me trying them on though🙄).
Make sure you're wearing the right bra. Bravissimo is okay, if you can find one. Rugby & Peller even better, if you can splash the cash.
Wear clothes for your shape. Google advice if necessary, don't deviate from styles that suit the pigeon breasted (ie v-necks are good, roll necks, not so much). I think avoiding big patterns or anything too busy helps.
Work on your posture.
Exercise - the more you like and trust your body as a whole, the less focussed you'll be on the one thing. Or two things, in this case.
Finally, big healthy breasts, if you have them, are better than the alternative. That goes for any body part. You don't really appreciate your health until it's gone.