I'm not surprised that some of the guys aren't being honest about their height. People on those sites either put old photos or photos of someone else on there, as well as tell little white lies about personal data...but if you can be patient and weed through the ads, you may be able to find some good men in the mix...it's just that you have weed an awful lot to find them.
As for your xh, maybe he'll get lost on that tall mountain. He's just another lost soul out there trying to impress people along the way. Be thankful you aren't dealing w/him any longer.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.