The 27-year old Venezuelan international arrived at Parkhead from Madrid in the summer on a season-long spell but he feels it has been a bad choice.
Miku, who has scored goals in Spain's La Liga, has made just 14 appearances for the Hoops for two goals but he feels he has not been given enough chances by two-faced manager Neil Lennon.
"It has been a huge mistake coming to Scotland to play. I cannot do anything to change the situation," he told SunSport.
"At the beginning, I didn't understand why I couldn't play. I used to ask myself 'How can you come from the best league in the world and not participate regularly in Scotland?'
"The truth is that I don't speak with the coach any more. I like face to face contact.
"I'm not happy when someone tells you something then says something different behind your back.
"I am aware that the coach is going to use local players or the one he really trusts. If there is an injury, maybe I can have an opportunity to play.
"I was a young and very impetuous person but I did understand that Villa was the player who should be in front of me.
"The last time I played for Celtic was when I returned from playing with Venezuela - and I scored. After that, I didn't take part in the next six games.
"Maybe I should have been born in Scotland to have a chance.
"I have a few interesting options to return to Spain to continue my football career there. Next time, when an opportunity comes around, I have to think twice before I make any decisions.
"When the season is over and I am back on the plane, I want to forget this experience in Scotland."