While on loan from United at Dortmund, Januzaj has blamed the lack of playing time for his lack of form.
Januzaj has just completed two 90 minutes matches for Dortmund and is yet to feature in the league.
The youngster blames Tuchel’s resistance to use him for the lack of form.
“I do not have the form to play better on the field. I just need more games,” Januzaj told reporters.
“I train very hard, but I do not have many games in my legs, which makes it difficult for me mentally. I need more games to be a better player.
“I have qualities that I demonstrated in Manchester. But it is difficult at the moment.”
United manager Louis van Gaal said last week that Januzaj may come to regret his Dortmund move as it looks to have stalled a once-promising career.
While clearly frustrated at Dortmund, Januzaj was also hesitant to suggest a return to Old Trafford would help him recapture his best form.
He added: “I wasn’t surprised to get loaned after scoring against Aston villa. I wanted to go somewhere I can play more often. I am happy in Dortmund, but I need more matches.
“I don’t know if I will play for Manchester United next season.”