Nahhh... early 80s Ballys were fairly easy to beat for the most part with a few exceptions. However, Bally 60s 2-inch flipper games - now some of those titles were flat out brutal to the player.
As far as 80s games - Firepower with that huge drain on the left kicked my butt. How about the Williams games with the banana flippers - wow were those brutal or what! Cant speak for 90s or later... don't have a desire to play them; I'm too old and tired.