Problems are visible long before anybody says them out loud, because the first person to speak risks looking negative or disloyal. So everyone waits, the thing gets worse, and by the time it is undeniable the cost has multiplied. Whoever absorbs that small social risk early saves the group a large amount later.

If something has been quietly not working for a while, say it plainly and without drama at the next sensible moment. Describe what you are seeing rather than who is at fault. Say it once and let people sit with it.