Steam download speed capped in CachyOS?

Hi, I'm stuck and I've been trying different things for weeks and i can't find a solution

On windows i could reach up to 7 Gbps on download speed.

But for some reason, not matter what i do, not matter what i download i get 1.2 Gbps to 1.5 Gbps on CachyOS.

It's like it's capped, it spikes up to 1.1gbps and then never goes higher with a few spike to 1.5gbps.

here's everything i check

• Not a CPU issue htop shows no single core above 10% during downloads.
• Not an SSD issue my Samsung 990 Pro does 2 GB/s (16 Gbps) in fio, well above my internet speed.
• Network stack fully optimized – BBR, ring buffers at 32768, TCP buffers maxed, no bufferbloat (Grade A).
• HTTP/2 makes it worse – Enabling it cuts speed in half (500 Mbps). Disabled is better but still capped.

An aria2c speed test show at least 4 Gbps on download.

Any help would be greatly appreciated.