Over the past two weekends in limited release, Martin McDonagh’s tragicomedy starring Colin Farrell and Brendan Gleeson has posted better numbers than Focus Features’ “Tár” but well short of McDonagh’s 2017 Oscar winner “Three Billboards Outside Ebbing, Missouri.” That trend has continued as “Inisherin” beat the $1 million total earned last weekend by “Tár” from 1,095 theaters while grossing roughly half of the $4.4 million 3-day total that “Three Billboards” earned from 614 theaters on Thanksgiving weekend five years ago. Such a result is to be expected, as arthouses that survived the COVID-19 pandemic labor to bring audiences back to theaters for critically-acclaimed but challenging fare.