I'm sorry to hear you had a bad experience with the asset pack, can you give me an example of where the alignment is off ?
when I make the asset I use the 16 by 16 pixel grid. and when I look up RPG maker MZ it looks like it uses bigger titles probably around 32x32 pixels or higher. I don't know if it is something you have to manually change or if this is even a problem ><
I would love to help you, I just need a little more info on the problem c: