Well, that's your opinion, I know what I've seen on my device.
Look at the screenshot below, 3 and a half hours of it was youtube btw.
10 hours are easily achievable, even 11, maybe 12 if you're just browsing the web.
As I've said showing...
Are you talking about GPS not working on Oreo - this thread is about Oreo?
If not, it is very important which build exactly is on the phone, was it rooted, messed up something, etc - generally GPS works in stock ROMs and there should be no pro...