Watford is one of those teams who have a very good solid championship level team but when it goes to premier league it just becomes very hard to be stable.
The level of challenge between Championship and Premier League are huge. That's it. Such a life and such a challenge for Watford and from any teams promoted from Championship every season.
I mean think about it, we are talking about probably the biggest league in the world, sure la liga, Bundesliga, ligue 1, serie a all of that are awesome but premier league might be the biggest of them all, at least right now it is like that, at one point 10 years ago Barcelona was winning ALL the games and we may consider la liga bigger, but right now I think its premier league.
Premier League is a biggest league in aspect of finance but I am neither sure nor agree with the statement that it is the biggest or the best league in the Europe and around the world. Within last 10 years, there are limited clubs from England have won the Champions League. Most of them came from La Liga. Despite of recent falls of performance and competitive abilities from La Liga's team, Barcelona, Real Madrid and A.Madrid, it is unfair to call Premier League is the biggest and best one.
They have biggest football industry, yes.
They have most of best football managers: Kloop, Pep., Mourinho, Ancelotti, (maybe) Allegri, etc. Yes
They have a biggest and best league: Nope or not yet.