Have they stopped doping?
good question
I do think more likely it's a combination of the forced coaching changes, a thin squad and cumulative fatigue though, maybe even a lack of hunger
Barcelona doesn't look like the same team since their coach got sick. They should have kept Guardiola as they were very successfull under him. I don't understand why some big clubs don't want to keep their successfull coaches. Del Bosque won CL for Real Madrid but they sacked him and haven't won the CL since then. Similiarly, Chelsea doesn't look like winning league titles since sacking Mourinho and Ancelotti.
Nothing to do with Guardiola actually WANTING to leave then?