A team with no bad days probably also has no honest people.

A group where everything is always fine is usually a group where nobody has permission to say otherwise. Bad days do not stop happening, they go underground, and what you get instead is politeness, a lot of fine thanks, and problems that surface much later at full size. Honesty makes a team look worse and work better. Smoothness is often just silence with good manners.

Be the person who says the unglamorous true thing: that you are behind, that the plan has a hole, that today was rough. Say it plainly and without drama. Watch how fast other people follow once one person has gone first.