So open registry editor > Copypaste this into the bar at the top (below file, edit, etc) - Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options, then press enter with it highlighted so its open on the left column in regedit (you might want to drag it out to be bigger) > Right click on the "Image File Execution Options" folder on the left > New > Key > Call the new key BrawlhallaGame.exe > Then right click BrawlhallaGame.exe (on the left) > New > Key > Call this second key PerfOptions > Right click PerfOptions > New > DWORD (32 bit) Value > On the right it will appear > Name it CpuPriorityClass then double click it > Set "Value data:" to 3, from 0 > Press okay. and that should be it
if thats a bit much I also found a video explaining the process (why doesn't he just do it through task manager???)
either way its exactly what i described. from the timestamp to about 4 minutes, you shouldn't need to set the anticheat to high and i haven't watched the rest of the video so just till 4 minutes should be fine
https://youtu.be/0MT-ONVJGdM?t=44