To be fair although the sentiment of your post is fair a few things in it I don't quite agree with, for example I thought Julen had the final say on the last influx of players, so if we've brought mediocrity he needs to shoulder some of the blame (although I did read that on here so if its made up bollox, then your point stands)
I do not think we 'missed a window' to sell Neves and Adama. I honestly believe no one came in for them, unless you're eluding to a couple of seasons ago when Adama was worth £70mil according to some on here.
The Barca deal I think was considered a 'means to an end' although there was just one flaw in the plan, Barca never realised how shit Adama was/is.
The Coady deal I just think was the club honouring the wishes of their club captain who I think, every one agrees , who's days here were numbered, whether that was to save his England career or to escape for that horse faced twat we'll never know