I'll speak to you in a language you can understand.....
"Federer is the almighty as far as tennis is concerned, he can do no wrong when he's on a tennis court or has a racquet in his hand. The only time he's threatend or pushed is due to his own doing, and playing up to his usual playing standards (you the one which no other player can see with a telescope), not due to anything the player on the other side of the net does."
Am I speaking your language now?? I just don't have response, you're absolutely right. Federer breezed through his 4 wins over Agassi cuz Federer just can't be touched. The reason Federer struggled in the other half of his victories (twice in slams) had absolutely nothing to with Agassi at all, or matchup issues, it was Fed who never played well on those occasions. The same cannot apply for Dre, cuz every time Dre steps on the court and Federer is on the other side of the net Agassi is automatically at his pinnacle, and Federer with a torn MCL, playing with his left hand will still straight set him.
Federer .... all praises due.
Federer was a terrible match-up for Agassi though, in the same respect as how Safin is a bad match-up for Agassi also. Federer can do everything Andre can do, and better in some respects (forehand, backhand variety, defense, movement, etc). Andre maybe does two things better than Federer (backhand and return of serve), while Federer has a plethora of things that he does better than Andre.
Also what abmk said is true. Federer in general hits outside of Agassi's strike zones, while Agassi hits flat balls, which is perfect for Federer who uses a mild-SW grip / extreme eastern grip, and a eastern backhand grip, all which are suited for hitting low to mid level balls.
The matches that were competitive were generally because Federer pulled a lollygaggle (after Federer demolished Agassi in the 1st set of the USO 05 final, he kinda just disappeared and woke up in the 3rd, then blew past Agassi in the 4th), or the weather conditions were not favorable towards Federer (the 04 QF match had tons of wind).
Agassi WAS competitive a few matches, but more times than not, Federer literally blew him off the court.