Besides giving them life, the world, the fade and free will?
They abandoned him before he abandoned them.
That's the story.
How did they abandon him when they didn't even know he existed?
They don't know if he really created all that, The Elves have seemingly been around a lot longer than the humans yet the maker was still silent to them, and they had no indication that he existed, but humanity comes along and all of a sudden this invisible man supposedly reappears and picks one of them to pass on his message, after saying nothing for thousands of years? maybe even longer? It's no wonder only the humans believe in him and every other race thinks they are crazy. Yet the humans do admit they're worshipping the same god that cursed the world with blights, and will invoke natural disasters upon his creations one seemingly after another to a mostly human empire no less. This doesn't strike anyone else as strange?
The Dwarves and Elves live peaceful for god knows how long knowing nothing of this Maker who if he did exist was silent to them since forever, until the humans show up crazy as always. Then all of a sudden the world is ****ed and this Maker is mad at everyone because some magisters trespassed into his house so he pretty much shunted them back to Earth along with some taint to create Darkspawn. Then he after he ignored the world since forever decides to pick a human woman out of the blue because she sang a song that was so awesome it moved him. Wait, so either he's ignoring his creations or he isn't which is it? He eavesdrops on Andraste but couldn't find the time to see the Dwarves or the Elves, possibly the Qunari as well not screwing up his world, or invading his realm to pass on a similar warning or message of, "hey you kids, stop worshipping false gods and turn back to me and i'll come back and make paradise available to you all." seems like the Elves and Dwarves already had paradise. Still the Maker picked little ol Andraste and with the help Elves, the Alamarri and god knows what else worked his miracles through them to over throw the Imperium? Why do all that when he clearly displays his ability according to the Chant to simply kick out the Magisters, why not simply smite the entire imperium, and go back to his silent not speaking to anyone but this one chick here ways?