You are making extreme judgment based on aayah which could be interpreted other ways.
Quran Surah (Sura) Maida (Maidah) English Translation by Abdullah Yusuf Ali, Recitation By Said Al Ghamdi MP3, Free Download
“If any do fail to judge by (the light of) what Allah hath revealed, they are (no better than) Unbelievers”.
Secondly, you need to read the full aayah to understand the context. Read tafsir of ayaah 44 here. Surah Al-Ma'idah - 1-120 - Quran.com.
In this aayah, Allah is saying that those Jews who change Torah to hide Prophet of Islam’s signs are the ones who are the unbelievers.
You won’t find the solutions of present problems directly addressed in Quran, sunnat, hadith, etc. You need interpretations.
But who decides which interpretation is correct, and which is wrong? For example, is picture-taking haraam? You ask three different maulanas, and you will get three different answers.
So now when that religious tyrant imposes complete ban on picture-taking and you disagree then would you still consider that tyrant to be following shariat according to your interpretation?