Keep an eye on thermals with s-tui. You could down-throttle the processor with tlp. At some point you’ll probably have to deal with the thermal-transfer pad being bad or whatever, that is never a fun job on a laptop.
I haven’t had much luck with XQ. I don’t believe that Bluetooth can reliably find enough bandwidth for it, unless you’re willing to blow up a few neighbor’s WiFi points/baby monitors/microwaves/weather radar stations.
Fun fact to keep in mind about your MX4 - if you use the “pair with two devices simultaneously” feature, the headphones shut off their LDAC support. All you get is the baseline audio codec. Nice, huh?
You missed their flirting because a good portion of your highschool class discovered that the absolute funniest gag in the world is to “flirt” with you.