I think I've figured out the source of 90% of my wrong keypresses.

[Penthea]

I have 12 classes at 70 and have never used one of those horrid things. the GCD is just long to the point of being off putting.

Maybe this game isn't for you then. I certainly found the gcd very jarring at the start but I got used to it and at higher level you end up filling that time in the gcd with ogcds or dealing with boss mechanics. If I have any problem with the rhythm of combat in this game, it's the server ticks. Sometimes they just work against you and you can't do anything about it.