Alonso got consistent performances with Bayer Leverkusen throughout the season and his results would have been even more valuable had he been able to win the EL final. Those coaches who can achieve long-term stable results are valued, if Alonso doesn’t achieve anything with Bayer next season, the attitude towards him will also change, they will say that he was just lucky, or even regarding the final, a strong team could beat Atalanta, which means luck also played its part role for Alonso.
Exactly, if Alonso wants him to be continuously praised as a good coach, he needs to repeat the same thing he did in his first season at Bayern Leverkusen coaching them. At worst he should not be on the wrong side of the final result after the season. He is a respected coach more since he won the trophy without losing any match. He needs to continue that performance with them until he fully believe and make that impression to everyone that he can be the best coach everyone wants him to be and like other successful coaches and not just a lucky one as others might foresee it.