River and Boca, both stuck at the bottom of their groups. What actually explains it?

Options

• a squad rebuild nobody planned properly
• pressure from the stands that leaves nobody room to work
• a calendar crammed between the league and the cups
• boards that never back a coach long enough
• the rest of the league simply got better
• injuries piling up from the first week
• no collective idea, whoever the names are
• one unlucky half-season, nothing structural
• the usual folklore, this happens every year