Sorry you are having such a hard time with your Orbea! I own an Orbea Onix and I love mine. I have had a couple things on the bike replaced. But, not like yours.

Has this been all from the same lbs? Could you get a second opinion from another lbs that's an Orbea dealer? Was the bike new? If you are the original owner, you would have the lifetime frame defect rights w/Orbea. Or maybe checking with Shimano on that particular lot of components to make sure there wasn't a problem.

If you don't get the responses you like here in General Discussions you might want to try re-posting in the maintenance section of the board. We have some bike shop mechanics on the TE forum and they might see your post pop up there if not noticed here.

Hope you find some resolve soon!