I love Sadio Mane and I believe he left Liverpool prematurely, the squad wasn’t ready for his departure and they felt it greatly that season
Klopp and Liverpool did try to replace Mane and Firmino by buying Jota, Diaz and Nunez but they either got injuries or had troubles to play well at a new club with new team mates.
It pained me to see Mane leave the club when Liverpool had the capacity to meet his demands. Liverpool are struggling last season because their top players are aged and fatigued and couldn’t put up a performance that matches that of top teams in the premier league, their performances didn’t come anywhere close to what they deserved or expected.
Liverpool could give Mane better salary but it is not a decisive condition from Mane request. He wanted to be a brightest star in Anfield and no longer wanted to stay behind Mohamed Salah. It's a big problem for all and Liverpool decided to not satisfy Mane so he had to leave.
Sadio Mané was one of the club's toughest important frontlines. Jurgen Klopp respected him because he possessed the strength and precision on the ball, he was capable of driving the force into his opponents yard box without hesitation, and he has exceptional dribbling skills and footing on the ball. Most fans were shocked by Mané's departure from Anfield; they couldn't believe the Senegalese would go so soon, but he was treated unfairly in the system. Perhaps Liverpool has learned from their mistakes and will use this transfer window for addressing things.
Klopp understands the importance of Mane but he gives the most important role to Salah as a brightest star of the club, not Sadio Mane. Mane actually got big improvement from himself and contributions for Liverpool and his national team Senegal became bigger each year. So he thought he must be recognized better and should be given a bigger role in Liverpool. He believe he is better than Salah and you know Klopp and Liverpool had to choice, Salah or Mane. At the same time, Mane made his own decision to leave Liverpool and join Bayern Munich. The rest is history in the past season but it has yet been the ending for Mane in Bayern Munich. He still has time to prove himself there and a new season will soon start in next one month.