When people (1) fly because they have to, and (2) don’t have many competitive options because of reduced schedules, inflight product doesn’t drive business. And airlines are looking to conserve cash. Even when business turns around, it’ll take time for product to recover as carriers try to manage their debt burdens.
In the near-term, airlines are restoring their schedules (somewhat) on domestic routes and there are (some) more passengers willing to travel. That means competition starts to matter.