I am 172 cm (5'8") with a biking inseam of 79 cm.
Hang in there - you will find a bike with a geometry that fits you with some adjustment via stem length, head tube spacers, handle bar shape, and seat post set back amount.
Also, take the fittings and fitting methods with a grain of salt because they are only as good as the fitter and his/her experience. And, as your biking endurance, strength, and flexibility increases, you will find that your comfort geometry changes - go back to the fitter you like the best and then get another fitting adjustment.
I found a good fitter who uses the Juteau Cantin bike fitting rig system - though the key point is that he is a good fitter. I have had a BG bike fitting with less than satisfactory results and a Retul bike fitting that I felt was way over my head - I think the methods were okay but my issues were with the fitter.
On to my geometry, I was lucky that I found a good first bike - a Lynskey Helix OS. I got to try both a Size S and Size M but chose a Size S (53 eTT with a 48 cm sear tube) based on th dealer's recommendation eventhough the size M (54.5 TT) felt more relaxed and I did not feel as cramped. He told me that the 30 minute try meant very little but he was extrapolating how I would feel after 3-4-5 hours on the bike. And, he told me that Lynskey has a total satisfaction guarantee and I could always return the bike!
I then brought my frame to the the Juteau-Cantin bike fitter and we fit the frame to me by trying different stems lengths, steering tube spacers, and different handle bars. At the time, I was a beginner road biker averaging less than 2000 miles a year with typical rides of 25 miles with a cadence of 85 rpm.
My first set up was:
1) a saddle height of 69 cm with 25 mm seat post set up off a 74 degree seat post angle and a saddle tip set back from bb axle of 43 mm - I start with these dimensions because these numbers will not change from bike to bike because they relate to my leg dimensions with Speedplay pedals on Speedplay-specific shoes (unless I change to a SMP saddle or change shoes).
2) head tube length of 12.6 cm, head set stack of 13 mm, a spacer stack of 35 mm, a 100 mm stem, with a compact handle bar with a reach of 128 mm and drop of 78 mm - these dimensions resulted in a saddle to handle bar drop of 4 cm -my fitter told me that these dimensions will change/could change with increased bike rider strength, endurance, and flexibility.
Currently, 18 months later, I am still a relatively new. I ride about 130 miles total on the weekends as my training rides in about 7 hours total. My average cadence is 90-95 rpm and my typical rides now are 50-70 mile solo, non-stop rides at an average speed of 18 mph. The shorter 50 mile rides are closer to 20 mph average speed. My training goal this year is a 5 hour solo century.
My current bike set up for the Lynskey Helix OS Size S has changed a bit and I have had two more Juteau Cantin bike fittings:
2) head tube length of 12.6 cm, head set stack of 13 mm, a spacer stack of 20 mm (16 cm effective head tube height), a 100 mm stem, with a compact handle bar with a reach of 128 mm and drop of 78 mm - these dimensions resulted in a saddle to handle bar drop of 6 cm. This is the cheapest solution - ENVE stems and handle bars are two expensive to change - I just slightly bend my elbow or at the edges of the hood when I am on the hoods.
My second bike, a training bike, has a slightly shorter effective top tube of 52.5 cm and a slightly more relaxed head tube angle of 72 degrees (Helix OS has a 72.5 degrees head tube angle). But, it has an identical seat tube angle and a head tube length of 13 cm but uses a threadless spacer with a stack of 31 mm. So, I only use 1 cm of spacers (17 cm effective head tube height), a 110 mm stem, with a identical compact handle bar. The saddle to handle bar drop is 5 cm.
The key is to find a position that you are comfortable on the hoods most of the time, then, as your endurance and flexibility increases, go down into the drops more, then bend your elbows, then reduce the steering tube spacer amounts.
PS. My next bike is a custom carbon bike.
2012 Lynskey R330 with SRAM Red Quarq
2013 Parlee Z1 with DA 9070
2013 Lynskey Helix OS II with SRAM Red