Wow! I've hosted a good bit and that's completely different from my experience.
> Women would be surprised that I had a bed just for them
It sounds like you were taking a lot of the desperate people on the site that aren't mostly in it for the cultural exchange but to save $5. Because here's the thing - everyone's profile has a section detailing what kind of room/bed the Couchsurfer will get. A "shared bed" is a red flag the size of Russia.
That's the other thing: I like to read the CS profiles of the guys accused of being creepy. 95% of the time, it's VERY obvious who they are. Guys will have "sex" in their interests, only have a shared tiny bed, or pictures of them shirtless, or 100% references from young women, etc., etc. That's the beauty of Couchsurfing - if you see a profile that you're not 100% confident in, then just move on; there are fifteen million people.
The real problem on Couchsurfing stems from people not reading each others' profiles. People get greedy, see a way to save on hotels, then send out copy-paste message spam that's not unique to your profile. I only host people who send me a message personalized to my profile, and even then that's after a lot of reading their profile, references, etc. I simply ignore the copy-pasted messages - if you don't care who you end up with, then you're not Couchsurfing for the interesting experience, you're doing it to save a few bucks.
If you don't read profiles and carefully select, then you're basically rolling the dice. This is the #1 cause of bad Couchsurfing experiences.
TL;DR: if you choose a host without reading, Couchsurfing just becomes Omegle IRL.
(If you're a woman reading this and want to Couchsurf 100% safely, you can do things like only surf families, other women, places where you'll get your own room, etc etc.)