In modes like Domination or Hardpoint, focus on the goals rather than just kills.
Intel Core i3-4340 or AMD FX-6300, 8GB RAM, NVIDIA GeForce GTX 670 / GTX 1650 or Radeon HD 7950.
Ensure your magazine is full before entering a new room.
Avoid downloading .txt files from unofficial sources that claim to contain the game itself; these are often scams. Use official launchers: PC: Download via the Battle.net App. Consoles: Use the PlayStation Store or Microsoft Store.
If you are looking for a "config.txt" guide to boost performance:
You will need at least 175GB of free space for all game modes.
Tailor your weapons and "perks" to your playstyle (e.g., stealth vs. aggressive).
Lower and Ray Tracing to significantly increase your FPS (frames per second).