If you are talking about hopes for a good result in the Champions League, then I don’t remember when any team other than Bayern showed something good there. If you're talking about competing for the title in the Bundesliga then even more so 
Unfortunately, the Bundesliga is not progressing, but rather lagging behind other top leagues.
Unfortunately, the Bundesliga is not progressing, but rather lagging behind other top leagues.I must also admit one thing about Leipzig that they were far worse in this season compared to the previous one. In the previous season, Leipzig even fought for the title for some time. Maybe they couldn't keep this fight going on until the final moments but they still finished the season at the second place in the standings at least. But in this season, they had a big problem on even qualifying for the Champions League. I also hope they get better next time.
Unfortunately, it is an illusion that Leipzig were in contention for the title (just like for example Napoli this season). The championship is not a sprint where you need to get around a competitor as quickly as possible - you need to correctly distribute your forces for the whole season. That is why we often see how some teams lead for a long time but then start to fall sharply down (Atalanta, Betis and other examples although they were not in the lead) - they just do not have enough energy to fight throughout the season.