Mainz's situation this time is quite different from last season's consecutive defeats and only being able to get two draws meant they had to be in the bottom two. Last season they were the team that prevented Dortmund from winning the title and also competed to be in the European zone even though they ultimately failed, but this season they are struggling to get out of very bad conditions and next week when they have to face Bayern Munich their position will very likely not change because beating Munich will be much more difficult than maintaining their lead in yesterday's match where in the end they only got 1 point.
And indeed for the next match there is almost no possibility for Mainz to get points because they have to face Bayern Munich, and indeed Mainz's performance at the start of this season is still very bad unlike last season.
The issue is that "they were already expected to get some points anyway" is not a good enough reason to not make them happy about getting points, if they do get it like this, they should be happy, doesn't matter if they ended up being already expected to get it already. Plus, as someone who has worked closely with professional athletes, there are moments when they are incredibly happy, but there are also tons of times when they just go out and work like we all work, don't really feel all that emotional after a game, it is just business.
From a team that has finished ninth in the last season, Mainz, I think almost all of us kind of expected a better performance. But they were not able to perform as well as they should have in my opinion. They have not been able to win even a single match so far as you said. Now I am not saying that they are not going to improve. Only seven matches have been played so far. But the thing is they need to improve quickly.
Otherwise, it is definitely going to be a problem for them. They are currently inside the relegation zone. First of all, they will have to get out of the relegation zone. Right now, they will have to get a win soon. That should be the main priority.