I always got this feeling from them. Like she was more enthusiastic about him but I always got the feeling he was deliberately kind of standoffish and playing hard to get in a way to keep her interested because he needed her more. Also really didn’t like the way he was always belittling her and putting her down for that reason, it’s like he was deliberately keeping her self esteem down a bit so that she would never leave him for someone better?
It's quite sad really. She would make a point to big him up and fawn over him because he, kind of had low self esteem, didn't believe she would really want him, but his response was often to act like she was an air-head idiot.
Like when someone can't take a compliment so has a self deprecating comeback- you might say 'you look great today' and they'd joke reply 'you need to get your eyes checked' but blush and appreciate it. Jim, being socially awkward, would say it in a
crappy, accusative way to imply she was stupid for thinking it.
That was all early -pre-youtube days. I didn't really hear much after they got bigger and moved to London but I get the impression he started to believe his hype but never stopped behaving that way toward Tanya.
Thinking about it, she was doing it to be kind and bring him out of his shell and boost him. It's not surprising if she's become a bit bitter.