Honestly, I personally am not surprised by that draw result because I also always consider about failure. But yes, because I also bet on Liverpool, at least there will be a sense of disappointment because I lost the bet, but even so I still accept the results and even, in another post I also really appreciate Manchester United and I also said that Manchester United deserves points. Because indeed, even though the team has good dominance by being strong at the top of the standings, it will not make the team always win every match it plays, so this draw is certainly a common result.
Honestly everyone did think about "yeah it could happen" levels and that s not really shocking but that doesn't mean that it was a guaranteed thing. When a team does amazingly, everyone starts to wait for them to finally start to lose and that eventually always happens. No team goes unbeaten forever, I mean in theory even Leverkusen did lose, maybe took them whole season to lose but they did.
And in 99.99% of the cases it happens within the season, and draws are even more common and easier as well, every team gets that. So what I see here is that it just eventually caught up to them and I believe they are just reaching to that point where they are not really playing as well as they used to, at least not for that game at all. But this isn't going to change easily at all, it is going to be very tough to see for most of these teams because we are not going to see them changing to worse or better over just one game.
But there is now a special case where a team goes unbeaten and has yet no chance anymore to win the title. Serie A club Juventus Turin has more draws after 19 games than I have ever seen, which implies that not losing games doesn't make you a winning team. Liverpool though can be satisfied with a draw from to time, it doesn't change their trajectory towards the title as they are a winning team overall.
Leverkusen was kind of different because that loss against Atalanta cost them a precious title. I am sure they would have preferred to lose two Bundesliga games instead and take the title regardless. That would have not given them the record as the team going unbeaten for a whole season, but they would have won the minor triple instead consisting of Bundesliga, DFB Pokal and Europa League.
It really depends in which games you lose or have to be satisfied with a draw. As long as Liverpool doesn't get as many draws as Juventus, a point is rather a point won for them instead of two points lost.