Go to Galaxy store, install Galaxy lab if available and inside the app, install apo booster. It will take a few minutes, but will fix your software part.
Try to go to audio on the apps you are using inside settings and clear cache. five nights at freddy's
Speed up the phone as well. Activate the developers mode and disable animations, this way you'll get more power for your hardware.
Try to clear cache from bootloader mode.
That is exactly what I was thinking. Thank you for the reply.