Bale and Hazard are Perez's faulty passes. Tottenham and Chelsea worked hard to sell these players. You shouldn't expect them to be stable and good games. Peres should try to sell them and buy younger and more promising players.
Bale and Hazard are talented players. Real Madrid made no mistake in bringing them to the team. If their fitness problems could be fixed then we would get proof of their ability. Neymar also has a lot of fitness problems. PSG paid him a lot of high salaries, but Neymar could not play for almost half the season due to injury.
Bale used to be a good player and a good deal for Real Madrid years ago. In the latest seasons, he wasn't top anymore. Now under Ancelotti he has to prove himself again or he will be trashed like what happened to him under Zidane.
For Hazard, personally I find his contract a failure and disaster for Real Madrid regardless of his talent.
Neymar is unstable player yet he can add something to PSG, that doesn't mean that PSG could not find a better substitute than him.
Bale is definitely a talented player. And he has proven his skills many times in the past. I am hopeful that he will play well again under the leadership of Ancelotti. Moreover, no other striker of the team was successful in the previous season except Benzemaa. Ancelotti needs to use Benzema, Bale and Hazard properly this season.