On the other hand, Kirito is a character who automatically erases most of his enemies and earns the love and admiration of many women in a setting where he's supposed to struggle. And it's this lack of struggle that made many people grow tired with the character.
I hope this is sarcasm, because if you're serious, that's the stupidest thing I've ever heard of Kirito. In short, he was a beta tester before the start of SAO, so he knew a lot about the game system, but the only thing he really didn't have to struggle was against ordinary players, because he, cornyly, knew more than them and swung faster than them. But in order to survive in SAO, the only thing Kirito did was struggle. There weren't many beta testers, but knowledge of tactics against bosses can hardly be called an automatic victory. In the second arc, he struggle for Asuna, in GGO, he was on assignment for the police because of the killer, and fought for his life more than once. His skills in these games are explained by the fact that all these games are made on the same engine and the principles of combat were similar. That's why Kirito used the sword so well in GGO. In Alicization, he almost died of poison and struggle for the freedom of the virtual world when the virtual world became alive and chose to remain trapped in this world for 200 years, but to save it. Kirito's whole life is a struggle. If he were a real person, he would probably go crazy from the strain. Kirito has experienced more in 5 years than an ordinary person in his entire life.