Messi was undeniably elite in 2018-2019, scored 51 games in 50 games, gave 20 assists, scored 12 CL goals, including 6 in 6 CL KO games. He was also elite in 17/18 but had a very bad tie v Roma (still scored 3 KO goals in 2 games v Chelsea to win us that tie just about by himself).
He wasn't elite in 19/20. He was elite in the summer of 2021 where we led Copa America in every single attacking category.
He hasn't been elite in 21/22.
It's really not that hard, and most Messi fans are reasonable and will agree with this.
Your definition of elite when it comes to Messi is that he can't have a single blemish while playing in a declining club (until Xavi), with a disastrous board (Barto), while also aging and declining himself. Using this definition of elite, CR7 has not been elite since 17/18 since all he's done since then is 3 x CL R of 16 eliminations, WC R of 16 elimination, and Euro Cup R of 16 elimination. And when he was elite during the RM CL 3 peat...it was helped by all time great teammates. Similar to Messi's 08-15, only Messi's happened earlier and is "out of memory" now for some people.
Using this definition of elite, Lewa was only ever elite for 19/20 and 20/21. 21/22 remains to be seen on how he does v Pool eventually.
Most Messi fans aren't making excuses for Messi and owning up to his decline. You just have an agenda where you deem him responsible for everything that ever happened to Barcelona, while giving other all time great players (CR7 and to a lesser extent Lewa) a complete pass for their own struggles.