No depth to it. For so much action it's weirdly hollow. I guess you feel entertained in the way you would were you to watch someone repeatedly throw vats of multicoloured paint at a wall. At the end I half expected Mc to emerge, bellow "are you not entertained? It's a plot twist!", then...
The finale was the only vaguely nuanced part of Billboards. The directors used a battery of bazookas when what they needed was the odd carefully-aimed dart. I reckon they just think audiences are really, really thick.