Story like RSSG

I remember reading RSSG ages ago, I believe it was the second lightnovel I read after Moonlight Sculptor. Both of these got me into the litrpg genre. Even though I have fond memories of reading this as a teen, I simply cannot reread this story, because the writing is just too… simple? Is there any stories with a similar theme as in dude already knows all the stuff and kinda speedruns the game?