No, our relationship with him was on collision course midway through his second season and everybody could see it except for Woodward who offered him a new contract. Mourinho's short-terminism (which has served him well in the past) demands of the board to rejuvenate the spine of the first team every three years. So, when he said that 82 points is an achievement for this squad and that there was no way it could push for the title should the PL continued to be decided on 95+ points, he knew what he was talking about (from his own pov).
Where it would have all gone wrong, if we had chosen to indulge him, was when he would bring ready-made solutions and pushed Rashford/Martial and others into a more peripheral role. This place would go berserk and the atmosphere would become unbearable in no time simply because it would still be very difficult to compete against Klopp and Pep both in terms of results and entertainment.
Personally, i think he would have built an attack around Lukaku. The "three" in his 4231 would be burdened with carrying the ball through the lines and once we got into the final third, we would look to place crosses in the box against organized dwfences. Thus the links with Wilian and Perisic. It would not be very pleasing to the eye but it's certainly a very pragmatic assessment of our current squad's capabilities. And since the Caf agrees that the squad is poor and Ole shouldn't be blamed, i'd argue that it was a fair assessment too. The only problem seems to be who to get: a 30 year-old Perisic apparently is good enough for Bayern, our fan-base prefers a 20 year-old player from the Championship (with all due respect to the kid who's working his socks off).
Anyway, Mourinho wanted runners with the ball on the wings instead of Rashford/Martial and the fact that a hard working James looks like a proper player is an indication that he had a point. Mourinho was desperate for a player who could make a difference in between the lines (Miki, Sanchez) and although his choices were failures, Ole's decision to put faith in Lingard, Mata, Pereira was plain wrong.
In other words, our current predicament indicates that his lack of faith in this squad was correct. It's basically the best defence of Ole one can make atm, that the team is poor. But the changes he proposed would serve him best and not the team. We need a modern approach and fresh ideas, not hoof balls towards the target man.