Changing 2.4ghz and 5ghz channel names

My series x immediately connects to the 2.4ghz and over the past week I’ve noticed a significant drop in performance. Currently both 2.4ghz and 5ghz channels have the same name so it auto diverts the devices. Should I change the name of one in my network settings so I can specifically log in to the 5ghz channel? I understand when combined under one channel it diverts devices to whatever channel it thinks is most appropriate, but I feel having two separate network names is more ideal? Thoughts?