Low stamina full team before half time including gk

WHY my team runs out of stamina before half time and my opponent has full the whole game 

neuer it’s probably tired from conceding goal from every shot that on target ? 
can’t make a single pass…autoblocks bruiser plus sends me up in the air 

can any mods reply to me please as it’s not the first time 🕰️ m complaining or write down the issues im facing