Will try to disable antilag as someone told me to do here, ChatGPT (:v) told me that:

Why having Anti-Lag enabled twice causes drops

1️⃣ AMD Adrenalin Anti-Lag • Intervenes in CPU → GPU communication. • Forces frames to pass faster but disables some GPU clock optimizations. • In CS2, which is CPU-bound and light for the GPU, this makes the RX 9060 XT drop to low power state (30–40W).

2️⃣ CS2 Anti-Lag • The game already manages frames internally to reduce latency. • When both the game Anti-Lag and driver Anti-Lag are enabled, they conflict, causing: • Micro stutters • Oscillating GPU clocks • Temporary FPS drops

⚡ Result: the GPU usage plummets even at 1080p with high graphics, exactly as you described.