If you look at the top salaries in baseball the players are on the Dodgers, Yankees, Mets, Padres, Rangers and Phillies. The Angels have Trout and Rendon but they're usually not in the discussion when there's bidding for players now.
So even if you count the Angels who has top salaries and bid for the big free agents besides those 7 out of 30 teams? Blake Snell is on a 1 year contract so that doesn't really count. Fans of all the other 23 teams can pretty much have the same complaint as Nats fans. The only other big signing I can think of is Rafael Devers of the Red Sox but even the high revenue Red Sox aren't usually in the discussion anymore when a big free agent becomes available.