I do get the mobile version as in the screenshot you posted on my phone, just the "Request desktop site" option produces the hybrid version instead of full desktop version.
I wonder if "Request desktop site" does anything else besides that it removes Android from user agent string. Not really familiar with web development, but from quick google search it seems reliable auto-detection is PITA to get right. You have multiple ways to accomplish it and some are less reliable than others.
"Once a profound truth has been seen, it cannot be 'unseen'. There's no 'going back' to the person you were. Even if such a possibility did exist... why would you want to?" - Dave Sim