I know ellis' parents divorce would send him into a spiral next season and cause them to break up but I also think when he gets into Annie's external family and their lifestyle and how they don't accept him just like Allie's family didn't accept Noah which causes the break-up
crazy to think ellis doesn’t have a storyline outside of yearning for annie when he literally discovered his dad’s affair which has lead to his parents’ marriage falling apart and he had a half sister for a week