‘Selah and The Spades’ doesn’t deal a winning hand

“Selah and The Spades” – Selah Summers (Lovie Simone) is cool.  She’s a top student at Haldwell, a prestigious boarding school in the Philadelphia suburbs.  She’s a cheerleader too, but not the peppy, do-gooder, always-sunny type, because Selah has fought on the front lines at home and at Haldwell.  These days, her mother quietly pushes this talented kid to pursue perfection, at least with her grades, but voices aren’t upturned between mother and teen.  They don’t have to reach ugly, combative heights in 2020, because – off-screen – enough verbal…