Why does Dota 2 stutter during team fights on i5 13490F?

During a decisive team fight at the Radiant base, the screen suddenly stuttered like a slideshow—a total nightmare that cost us the game. I tried disabling all E-Cores in the BIOS, but this tanked overall system responsiveness and multitasking, which was very discouraging. I used the GamePP Resource Scheduler to force the game process onto P-Cores and set the process priority to High. Frame times stabilized at 6.5-8.2ms per RTSS, CPU temperature remained at 62-71℃ per AIDA64, and E-Core load dropped from 90-100% per CPU-Z.