Teaches you a lot of stuff =/= accessibility.
I don't know what else are you expecting from Guilty Gear. If you start the game for the first time, it will ask you if you want to go through the basic tutorial. Which teaches the player the most basic of movement and attacking mechanics in the game in the form of a mini game where you have to beat Jack-o's minions.
The mission mode teaches the player all universal mechanics, and most importantly WHEN to apply them. Then there's the individual character tutorials for teaching the players the tools eqch character has, and then combos.
There's even Matchup specific tutorials, this game laids out everything for the player.
Information overload doesn't even make sense as a complain because you cannot access certain character specific missions until you clear the easier ones.