Sorry, Mourinho's style of play is so different compared to City, Liverpool or Spurs. A idea of playing counter attacking is allowing the opponents to have a ball whenever they want. Liverpool, Spurs and City won't allow opponents to have a ball, they want to have a ball and attack it but when they lose the ball, they will press.
United didn't concede a lot of chances but if you watch the game, many shots aim at De Gea outside the box, it's hardly a chance. De Gea has probably faced amount of shots equally as Ederson in the penalty box if I recall. It means that we are better defensively compared to City, Spurs and Liverpool when they kept most of the possession against opponents. Only United's biggest weakness is defending a free kick and corner where it could lend to a goal, we dropped points because of that - Stoke, Leicester, Burnley, Newcastle and City = 12 points dropped due to corner/free kick. We only conceded an open play chance for Huddersfield, Chelsea and Spurs costing us 9 points, that's lower than conceding a goal from the free kick and corner but we didn't concede a lot of open play that could cost us points compared to Liverpool or Spurs.
Overall United is fine defensively, just need to improve free kick and corner defending and scoring a goal next season but If United can improve finishes compared to last season then I can see United will improve this again next season. United also have scored more goals than everyone baring City in the first half of season then regressed in the second half of the season, United still need to keep up with a scoring goal rate, this is one they will need to improve for the second half of the season for next season.
On other hands, everyone has a different style of play and gameplan, City, Spurs and Liverpool gameplan is so similar but not exactly same.