OK I see above the top tube is 55. I’m 6’2” with a 34 inch inseam, I think the Competitive Cyclist calculator recommended a frame with around a 56 top tube for me depending on the fit I chose. If you can stand the non vintage look of a set back post a couple cm will do ya. On my modern bikes I went with a longer top tube of 57.5 and 58 and use straight seat posts. Is your seat back all the way, if not move it back as far as you can to see if it feels better and then buy an appropriate seat post to fit accordingly.