Isn't it slightly ironic that you initially accuse someone of talking like they're inside the dressing room, only to insert the notion that, perhaps Lukaku was driven out of the club. I mean, this whole "i'm not saying you're a dickhead", "i'm not saying _____" might have worked at the age of 10....
Personally, i find it unfair to suggest that Ole disliked Lukaku from the start and wanted him out. When Braut Haaland played under him at Molde, Ole praised him and said he reminded him of Lukaku. There's not really anything that suggests that if Lukaku buckled down and said he intented to stay and prove himself, the club would've told forced him out.
Given Lukakus performances up to the point of Mourinho getting sacked, 6 goals between 10th of august and 16th of dec and his overall play being shite at best, it's hardly a surprise that Ole decided to let someone else have a go up top. Between the 15th of september and 1st of dec he scored 0 goals, almost 3 months without getting a goal and it's not like he wasn't playing in that period either. He offered about feck all up top, no goals and at the same time his overall play was quite frankly rubbish, all the priceless videoes of Lukaku up top waiting for the ball to stop bouncing so he could control it, it was bad for team morale to have someone like that escaping criticism from the manager while everyone else in the team was open for public ridicule. Any manager coming into the club with a situation like that on his hands would've benched Lukaku.
So where's the man up and prove yourself when he finds himself in a similar situation that his teammates were in when Lukaku mouthed off that they were "grown ass men, deal with it". For some reason it went straight to "i'd like to play in Italy, sooner rather than later", which was repeated by his agent quite a few times. I honestly have no idea how he's managed to leave the club like that with so many fans still defending him.