Seeing a steep decline after launch is expected for most games. I’m not informed enough to know whether the drop we’re seeing is bad. (Also given @philelliott’s quote below, it may actually be a pretty good trend)
I also don’t think you’re interpreting the steamdb numbers correctly. The “on right now” stat isn’t going to be indicative of trends, just a current snapshot of things. At the very least, “in the last 24 hours” is going to be a bit better of an indicator (but lagging)
Edit: goofed the graph portion of my post; I was wrong there
Other evidence that steamdb’s “right now” and “in the last 24 hours” numbers are not great indicators is this quote:
If steamdb was indicative of the overall trend—matching this 5% week over week decline—we should be seeing somewhere around ~680 players for the “in the last 24 hours” number (given that weekends are the peak)