Not annoying at all, on the contrary, it’s thanks to your feedback that the integration is progressing 
For the scale, unfortunately it’s not possible from the integration:
- the scale of the graphs is calculated by Gladys itself;
- an external integration cannot adjust it, neither in its widget nor in the « Graph » box;
- it always starts from the highest displayed value, hence the « flat » effect after a peak.
I could have cut the bars above a threshold, but the graph would be wrong, and a consumption peak (a leak, for example), is precisely what we want to see.
I have therefore made a request for Gladys to allow setting the min/max of the Y-axis: Graphiques : pouvoir régler l'échelle de l'axe Y (min / max)
It would be useful for all integrations (water, gas, electricity…). Don’t hesitate to vote for it 
As soon as Gladys allows it, I’ll add it to the widget settings.