This phone is good but the battery makes it horrible. I already have game optimizer on. When ever I play ANY game this battery goes down like a timer. And the screen doesn't even get that bright as other phones
Big arse high res screen = screen related battery drain
That goes for both phones and laptops, and although different screen technologies may make some difference (eg LCD, IPS), there's no escaping that fact.
Of course there are some activities that can make it worse (camera viewer open, watching videos, etc.)
The screen is typically the highest battery consumption overall on most phones (AMOLED displays are a possible exception, but depends on usage). So I wouldn't bother worrying about it other than turning down brightness when you can. If the display is on, the screen will use a large chunk of battery.