Which part didn't you understand ?
Personally i find it a bit odd that people have such love for Lukaku, it would suggest they are bigger fans of the player than the club.
Lets look at his time at the club, he has a good first season at the club,he has his obvious issues but overall it's promising and hopefully something we can build on, he then returns to the club looking like he's gone full Akinfenwa, clearly in no shape whatsoever to play football at the highest level, he'd make a few runs and spend the majority of the match looking knackered. Between the start of the season and 1st of jan he scored 7 goals for the club, combine that with his absurd holier-than-thou attitude, telling other players to shut up and deal with the pressure, only to instantly mouth off about sodding off to Italy as soon as it was made clear that he'd no longer have the same position in the squad. Some strong mentality that, yeah, proper big man. Oh and yeah, it was then followed by him and his agents attempting to force the club into accepting lowball offers from Inter, how much pre-season was he involved in again ? But yeah, lets rub one off for Lukaku and pretend we should've kept him.