are you judging the whole Ummah just on several or many people. Even if the whole Ummah keeping the Quran on the floor, it is your duty to stop them from doing so and tell them the right path, may be they do not know.

Even if many muslims they drink or doing other things as you have mentioned, these will not become right things (Halal) to do. The worst thing (Riba), many muslims are doing it but it will not turn to (Halal) it will still remain (Haram) and you know this.

We have to follow our Prophet Mohammed (P.B.U.H) and you know How he was and How He spent His life and left good examples.

Why dont you start preaching Islam since you are sure that you have good knowledge in Islam and i am sure also you have. Besides you are good in English also, so you can covey Islam better than anyone. Allah will help you and May Allah help all of us and all human being :)