He can beat an angry drunk guy or even be beaten by him. Going to the gym once a week is technically working out but that only maintains an average bodybuild, it doesn make you buff. Maybe he is fit compared to the average obese porno game consument working from home in priviliged first world country, at his age and livestyle his state is normal. Loves music, so does everyone else. He was just a bassist in an amateur band for funsies and hasn't played for years, there is no indication that he is a talented musician to swoon the ladies. Decent is a synonym for average. Spanish average is... not defined, Wiki has a range of 173-177 cm, so he is average with 175 cm. Even if he would be +1 cm technically above average, practically you wouldn't notice.
I give you intelligence and wit, though he can still write a shitty book and lose his job and he can still flirt aweful and not contributing anything worthwhile (not saying anything, saying the wrong hins to turn off his friends etc.)
I estimate you two consider Lena and Ian above average people that got wrecked by their breakups. I point out that this is on point with Lena, she is a 10 who is dealt an extremely bad hand: Her parents can't support her, she has to end her career, she isn't payed much, Ivy is a questionable influence, Louise is instabil, Stan is a creep, she has no support and almost all love interests want to take advantage of her.
Ian is a 5, but he is extremely privileged: His father pays him, Perry sticks up to him and wants little rent, Jeremy and Wade are bros, the girls care for him and most of them are relatively harmless if he pursues a relationship with them.
That's the basis the two characters offer for different playstyles. Lena is meant to be a 10 that has to struggle while Ian is meant to be a 5 that has chances to become everything between 10 and 0.