I find it appropriately challenging.
Me, too. The minigame is fun, and there's still an opportunity cost of broken lockpicks. If you don't want to be a thief character, don't spend your money on lockpicks. Pretty simple.
I DO agree that it has been "dumbed down" ... but it honestly does make for better gameplay, in my opinion. I hated in Fallout when I was 3 skill points shy of being able to open a lock. "I'll try to remember this and come back later." Not fun.
AsWeWept, it sounds like you are just damn good at the minigame. That's not the game's fault, it's yours. If you can call it a "fault".
