Your target demographic is at a lake.

Coverage there is bad in every sense.

Vacation

Also in effect on this date

The full docket. Any of these would hold up in a Monday standup.

Memorial Day flipped the country into summer mode and summer mode does not convert.
Holidays · in effect Memorial Day (3d after)
Every furniture and grill retailer is running a Memorial Day event against you.
Holidays · in effect Memorial Day (7d before through 1d after)
It is graduation season, and gift budgets have been claimed by people in rented gowns.
Seasonality · in effect 05-10 to 06-15
Graduation open house season is consuming every suburban weekend and its sheet cake budget.
Seasonality · in effect 05-20 to 06-30
End-of-school-year event density has peaked. Every parent is at a recital.
Seasonality · in effect 05-01 to 06-10
Families are crossing the country to watch a name get read aloud.
Vacation · in effect 05-10 to 06-15
Campaign media buyers are already testing against your exact audiences.
Politics · in effect 01-15 to 06-30 · election years
It's 72 degrees outside. Nobody wants to see your carousel ad.
Weather · in effect 03-15 to 06-10