With his time in charge, the interim manager of Manchester United admitted that he had expected the club to qualify for the playoffs.
The last home match in charge was won by United.
The club are sixth in the league and will miss out on the competition next year.
In the end, I am not happy with the results, especially in the past few weeks.
After former manager Ole Solskjaer was sacked in November, ex-midfielder Michael Carrick was in charge for three matches before former boss Rangnick took charge on an interim basis in December.
The 20-time English champion, United, had a disappointing campaign.
They lost at home to a Championship side in the fourth round of the FA Cup, went out of the competition in the last 16 and are 25 points behind Manchester City.
He said he was not happy with the six months he was in charge. The goal we had was to qualify for the playoffs and that is what I would have expected.
We lost a lot of important players. Three players were injured from the team that won against West Ham. The teams brought in players.
We had good moments, we conceded fewer goals, but in the last few weeks performances have not been as good as they should have been. We have lacked consistency.
He will combine his new position as Austria manager with a part-time role at Old United next season.
He will be replaced by a new manager in the summer.
So far we haven't been able to speak when asked when planning with Ten Hag begins. The focus of the team was on their games.
Other clubs only needed two or three transfer windows to challenge, but from now on we need to bring in top-quality players who really help raise the level. I don't think it should take a long time to become a major force again.
Juan Mata and Nemanja Matic are both set to leave the club when their contracts end in the summer. At the end of the season, Paul Pogba will be a free agent.
It is obvious that quite a few players will leave and there is a need for top-quality players.
If everyone works together, we can bring Manchester United back to where they need to be.