Imaam leading the Salaah with his trousers below his ankles

Q: In the area that I've moved to, the imaam of the local Musjid leads the Salaahs with his trousers below his ankles. Does it diminish from the Musallis reward to follow such an imaam and is it permissible?

Also, after every Salaah, the imaam systematically makes the same short dua after reciting taqdeer once and istigfaar thrice, followed by Ayaatul Kursi, Tasbeeh-e-Fateemi, the fourth kalimaah thrice, and then the same lengthy dua after each Salaah. Is this allowed? And if not, Should I as a Musalli remain in the gathering so as not to create any conflicts with the locals, or rather just leave and perform my Sunnahs?

Custody of children

Q: I am divorced. I became unemployed and was unable to provide the total maintenance for my son every month. As a result in a 3 year period I am at least 1yr behind on his fees which was his right on me to provide for him. He is now 6 years old and his mother remarried to a non mahram. I only got to see my son as his mother wishes. Mostly Sundays maybe sat nights and Wednesday. I feel this is not nearly enough time. My son can feed clean and clothe himself. I want him to come and live with me and he wants to come and live with me and he expresses it. His mother says because I owe her for his maintenance fees she is with holding him. She does not want him to come with me and threatened to leave the country with her new husband to stop me from having him. Islamically can she deny my right of custody because I owe her? Does my son have a right to be with me if he wants? I need advice and rulings. I realize this is very technical. I owe her money for my son’s maintenance, mother is remarried. I want to have my son; son wants to be with father. Mother does not want father to have son.