The 24-year-old has signed a five-year deal with the Scottish champions, after seeing a possible switch to Liverpool collapse.
The French international is more than happy with his deal at Ibrox - but he is not pleased with the way Houllier handled his possible switch to Merseyside.
Boumsong also confirms that Liverpool had struck a deal with his club Auxerre for his services.
"At the end of last season, an agreement had been found between Liverpool and Auxerre," Boumsong stated.
"Gerard Houllier explained that this agreement had to be put to the board of Liverpool and I awaited confirmation, but no news came.
"After having patience in November I knew Houllier did not want me anymore, even after what had been carried out with me and Auxerre.
"I find this attitude surprising, especially when he said a little later that I did not deserve to wear the shirt of Liverpool.
"I question his integrity and I am not the first who has done.
"He does things that are simply distressing and I wonder a little whether a man like that deserves to be in charge of such a club.
"The way he treats players tarnishes the image of the club."
Boumsong added that he wanted his future sorted out by the beginning of this year and he has found that agreement with Rangers.
"I wanted to be fixed up before the beginning of January 2004, so I would be right in my head, I wanted the calmness," he added.
"When I understood that I would not go to Liverpool, I looked at the options for another club.
"Everyone thought that I had already signed and I had to tell everyone I had not, as this is a difficult market at the moment and I wanted offers from large clubs.
"Inter took a step to me and then moved back and I never had anything concrete from them.
"L'OM [Marseille] made an approach at the end of last season, but the offer was complicated.
"Financially it was not up to what I was looking for as they had a limited budget.
"In fact they then made another signing. They then came back to me in November, but they made an offer that was not acceptable as my transfer depended on the sale of Daniel van Buyten.
"This was disappointing, I understand that a club can be limited financially but when a player is wanted there are risks to take if you want him to wear your shirt.
"At Rangers I found this respect, something I did not find elsewhere.
"I have actually signed a pre-contract with Rangers for the next five years, Rangers came to me with a very big contract.
"I really felt the leaders of the club wanted me to come, and for me the human relations are the main importance.
"Scotland is not the greatest championship, but Rangers are a large club.
"They told me they wanted to put past glories behind them and build a young competitive team and this was an interesting challenge.
"I think Scottish football is progressing, despite that it does not get media attention in France like England.
"Perhaps Rangers can be a springboard for me, a stage for my objective. I want to be in a competitive team next season and want to compete with the best in Europe.
"I know people have criticised my choice, but I have taken this and it is my decision and I have no regrets.
"People will say this is the wrong reason, but for me it is clear that I want a club where I am regarded."
