I am a dude, but what makes you think it's too small? I bought it from a 6' friend. He road it for a couple years. I'm 6'. I'm riding it 10 at least.
I just think aging and saddle change is mucking it up. But I had to change the saddle to protect my bony ass and junk. But I'd think this is still a usable bike for me.
It's not like I'm doing 100mi/day.