Issues with my ASUS PCE-BE92BT WiFi 7 PCI-E Adapter

So i recently got AT&T 5Gbps fiber i was origianlly using the BGW620-700 that was given to me by them and it was working great with the BE92BT I installed since i don’t plan on running ethernet. Was getting around 2Gbps down and up. My aggregated link speed was 2882/2090Mbps and the Network Band ( channel ) was 6 GHz (133), 5GHz (149). Then I proceeded to buy “Amazon eero Pro 7 tri-band mesh Wi-Fi 7 router” and use that as my router and as a mesh network because the extenders AT&T gave me were at best trash. But whenever I did that I would get horrible download / upload speeds around 90/300 on average the aggregated speeds were also horrible around 800/600 and the Network Band ( channel ) would be 6 GHz (69), 2.4 GHz (1). The internet in the rest of the house using the Amazon eero Pro was good it just seems to be my PC. I tried to be as technical as possible but i’d appreaciate help fixing this as it’s probalbly something to do with how the PCI-E card is trying to interact with the wifi. Any suggestions would be helpful!