Then that’s the fault of the device design, or using incorrect cables, and not of the communication standard. Using cheap CAT 5 cables that max out at 100Mbit instead of good quality 6a cables is going to mess up speeds too.
WiFi 6 offers ~9Gbps under ideal conditions, and that deteriorates with all the usual reasons for WiFi, and wired is 10 Gbps for whatever distance. The standard says wired is faster. Your particular device failing to meet those speeds doesn’t represent the communication methods.