First of all we are talking about an ''Empire'' talking about a monarchy. The answer yes Armenians were not unhappy in main time of Ottoman Empire. Their life is protected by Sultan, they can live their religion they can be social worker and even get higher position.While Christian Empires doesn't allow even 1 muslim to live in their empires Ottoman build hunderends of Churches, Synagogues in all around of the Empire. Just visit Istanbul and check the dates of them. Apart from this Christians-Jews who changes the religion even become Sadrazam (Prime Minister, second man of the Empire) big part of the Sadrazams in Ottoman and big part of the wifes and mothers of the Sultans were transformed from Christians. Sultan Mehmed's mother died as a Christian woman as a MotherSultan. Now don't ask me is this the happiness. Because you have to consider Empire ruled by Muslims and it was the century when Europe was killing the ''witches''. Catholics can't tolerate Orthodox. This was one of the auxiliary reason why Constantinople fall (Some Orthodoxs trusted Ottoman more than Catholics) Armenian was called by Empire as ''millet-i sadika'' which means ''trustful nation''. The problems started with rising nationalism and western imperialism. In any case, I mentioned a model tolerated to other religions, and multinational union including the Muslims, Christians and Jews whose life is under protection by state. Of course I don't refer Ottoman Empire totally as model. If Arabs can protect their Christians Jews themselves and become Union the peace can reach there.
Armenian Genoside is happened in 1915 by ''ittihat ve terakki'' and ''teskilatı mahsusa'' leaded by Enver Pasha and Talat Pasha. Now I can't explain to you the difference between ''ittihat and terakki party'' and Ottoman Empire model difference. Just with few sentences ittihat and terakki was a party leaded the Empire between 1912 and 1918. Enver and Talat Pasha were hard core Turkish Nationalist and they believed a one Nation State instead of Empire.
I tried to explain to you in 1915 Empire already collapsed in practically and a party was ruling the Empire Lands. Model of Ottoman was tolerated to religions if you compare it with equivalent Empires. Can you give an example one tolerated Empire in west? It is easy to critisize. I repeat you again who made Genoside (Enver and Talat Pasşa and ittihat terakki) was western minded modern Jon Turks. I know very well how French Empire or Great Britania was leading ''peacefully'' or USA brings democracy their land in Africa millions of people suffered, died. under Ottoman Empire for 700 year Middle East was a peacefull land. When Ottoman is divided by west and nationalism is get higher problems started...