Grafana. Most of our dashboards are parameterized and half the time, using the dropdown to select a different value for a variable doesn’t work. The menu just closes and the variable doesn’t update.

The “stacked” option when displaying multiple series is a super dangerous footgun; it will show you numbers that aren’t actually occurring.

If you accidentally make a too-heavy metrics query the entire page becomes sluggish and crashes, and you have to refresh and start from scratch. There’s no way to simply abort the last mistaken change.

If you accidentally make in invalid metrics query (like wrong combination of variables) then the entire dashboard gets into a corrupted state where even if you return to a valid combination of variables, all you get is red. Again, refresh and start over.

I don’t think there’s anything better out there. Perhaps we are a few versions behind, but the last major upgrade we did only made it buggier.