Neymar, Pogba and Hazard are perfect example of how a single move can ruin your career - Where you're King? Stay King.
Just because the move didn't turned out well form doesn't mean they made the wrong decisions, Neymar was already a king a Santos before coming to Barcelona, If Ronaldo had stayed back at Manchester United do you think he would have achieved half of what did with Real Madrid, should Mo Salah have stayed back at AS Roma because he was already one of the best in Serie A then ?
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I did not generalise my comment, and the most of the players you named were young players with great potential (not kings) who only reached their peak after leaving their comfort zone and became Kings.(Neymar, Ronaldo, Suarez, Lewandowski, Salah).
Neymar, Ronaldo, Suarez, Lewandowski, and Salah's first big moves matched Hazard's move from Lille to Chelsea; he was already one of the best in the French league but not the King, and he reached his peak at Chelsea. Do you understand my initial statement now?