She's addicted to or was addicted to LoL and fond of the esports scene surrounding it, so dating Pobelter is like being a girl who's into playing basketball, watching, and following the NBA and attracted to some ball player. Think Brittany Renner but less toxic. Plus her ex would ridicule, yell or humiliate her in-game making her feel like shit. I imagine Pobelter isn't like that to her so he's the polar opposite of her ex.