We don't know what Djokovic is/was going through in his life... none of us do
Its possible life as a world beater was hell for him (internally and mentally). Its not uncommon for high achievers in any field to have crappy life satisfaction due to having the obsessed nature that comes with the drive to succeed at that level.
My point regarding Djokovic is... Pepe's influence may be a 'cancer' for his game, but there's no way we can know what its done for his life overall (maybe he's turned a 'cancerous' life into one where Djoko enjoys life instead)
As tennis fans, Djokovic's decline is unfortunate to us
From Djokovic's perspective (which should matter a lot more to Djokovic than ours), maybe Pepe''s the best thing that's ever happened to him?
BTW, this is the last sincere post I'll make on Djokovic and Pepe and that whole circus thing because frankly, from my perspective, the best value of this situation is the potential for humour in it