Well for one thing, don't ever imagine a size given for one model of bike as being the size you need for another model of bike. If I go through the sizing recommendations for different models of bike on Specialized's site, I get different recommendations for different models. And it's been like that ever since the vintage days and before. Overwhelmingly though, people want something simple to grab on to and wrongly they still hold on to one size as being their size for any bike. Absolutely not true.... though many bikes are in fact close enough for you to get by and not notice since many people can get by on a range of sizes.

I sort of wonder if you would do better on a lower stack bike. Or at least straighten you back some and roll your pelvis forward. That might get you looking at saddle tilt or even a new saddle with proper cutout or profile.

I too grew up with way oversize frames for my 180 cm height (5' - 11"). I spent over 35 years on a 64 cm frame that I rode comfortably. But since turning 50 I've been steadily sizing down the frames and finding the smaller frames fit better and more fun since they are sportier handling and not riding like a big luxury sedan on the open road.