There's a limit to the number of subs that can be made. And you can't argue against the subs that have been made.
Raphinha, Pedri et al also needed rest.
There are few "easy" matches.
Monaco, Dortmund, Benfica, and Atalanta have already given us trouble.
Aston Villa could give us trouble.
Lille beat beat both Madrid teams.
Brest is the only weak team of the lot.
Sorry, but you're the one who is biased and not judging his entire time. Look at the table. We are tied at 4 place with Bilbao.
The "best league start" was followed by the worst 8-game run. And on average, this is where we are - a bad league season.