No they aren't. They help each other sometimes fighting against Syrian armies.
Pro Assad Syrian forces have been torturing and killing brutally. Slicing people's body parts, cutting parts of their heads, raping, burning, etc....
I don't know who should rule, the free Syrian army should hold the country and form a government and maybe make elections. But that's not the point right now.
In other words, outsiders from all over ME and N. Africa on US and Qatar money are "helping" foreign powers to overthrow the LEGITIMATE government of Syria, the government chosen by absolute majority of Syrian citizens, and you are OK' with it?
Why? Why government SUPPORTED by the people will start "torturing and killing brutally, slicing people's body parts, cutting parts of their heads, raping, burning" the very people who support it?! Are you familiar with the word "LOGIC"?
Free Syrian Army is NOT a unified organisation. But that's beyond the point.
So, you think the so called "free Syrian army" should take charge of Syria? On who's behalf? Just don't say "on behalf of the people of Syria", because an "army" that is armed, financed and directed by Turkey, US, UK, SA and Qatar can not represent interests of anyone, but those who direct, arm and finance it.