Should a person quit congregational Salah if they see some abominable acts there?

Q 1: What is the ruling on a person who does not offer Salah (Prayer) congregationally, due to the illegitimate deeds they observe, such as pronouncing the Adhan (call to Prayer) inside the Masjid (mosque), additions to the Adhan, forming groups of Dhikr (Remembrance of Allah) inside the Masjid while people are offering Salah? Is quitting congregational Salah in this case considered a sin? What is the correct ruling concerning this?

(Part No. 7; Page No. 305)  A: You should not quit the congregational Salah in the Masjid for the mentioned reasons. Adhan inside the Masjid is permissible; you have not clarified the addition to the Adhan exactly; forming groups of Dhikr is permissible in general, if they are groups where knowledge of the Shari`ah is taught, except when the time of obligatory Salah comes. Only then, these groups should be dismissed. As for the Sufi and similar innovative groups, they should be disapproved of. However, this should not prevent you from offering congregational Salah.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.