My mobile can play this game  But can not play easily

Fortnite

7.4

Battle RoyaleActionOnline Co-OpAdventurePvPShooter

Get

The phone that I use to play is Samsung

(1)I have been waiting for the page to load into the game for a long time

(2) Cannot adjust 100% sharpness. Frame rate will fall to 1 FPS

(3) Can play in less than 30 minutes, then bounce out

I was pleased to play Fortnite Please fix it and improve it