You're being too hard on yourself. And with 14 games in a 1.5 year timeframe, your focus is prolly broken. You're not focused on one or two games and having ONLY those to practice on and ONLY those to learn on.

I'd bet when you are playing it goes something like this:

"Well, I'm sucking on this game, maybe this other game will be better..." ... "nope. That game whooped my ass. Let's try game #3...." .... "Nope. Trying game #4" and you're pinging all over your game room and your brain is trying to get used to all these layouts, shot geometry, different angles, different modes, different reaction times, flipper gaps, weight differences (slapshotting a new Stern is WAY easier than a B/W) etc. and you're just beating yourself up.

Stick to one game....like for a month. Leave the others alone. Focus on the rules, the shot geometry, and the rhythm of what to do. Really learn that one particular game. Cause if you're pinging through 14 games, you're going to constantly struggle, and it is going to be a vicious cycle.

To me there is a BIG difference between beating a wizard mode and being able to kick ass and survive for a while.

Have I ever completed the wizard mode on TWD? Not even close. Got to Terminus I think and that was it. Did I think I sucked? Absolutely not. It is a decent challenge getting to Terminus. It's not Last Man Standing, but it's also not watching the ball drain 3 times in 45 seconds.

This is a very relative question, and I don't think equating your skillset to how many wizard modes you've gotten to is a fair representation on your skill set.