Jamaat Salaah and Imaamat

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?

Performing Salaah behind an Imaam with a beard

Q: I am a follower of Hanafi madhab, I have 2 masjids to pray salaah during Zohar, Asar & Magrib Salaah in my office, kindly advise in which masjid I need to pray according to Hanafi.

Masjid1: Shafi Imam with Sunnah beard but Quraan recitation is not fully tajweed

Masjid 2: Hanafi Imam(Aalim) without Sunnah Beard (i.e. Trimming the beard) but quran recitation is fully Tajweed. 

Till now I am praying behid with Shafi Imam because his beard is according to sunnah.