Moving to a completely new platform of detector is VERY frustrating. I felt the same as you when I moved from a whites 6000 to a Minelab E-Trac (yes, its been a while!)
You have the right idea, you just have let yourself adjust. Its all new sounds and responses and nothing feels familiar yet. If you start jumping back and forth to your old detector, its going to take a LOT longer to learn the new one. Here is my recommendation for all new users of any brand...
1 - read your user manual, from cover to cover
2 - play with the detector to get used to changing settings and modes.
3 - put it in a stock mode for your type of hunting AND LEAVE IT THERE. if you are constantly making changes to it, you are going to change the responses and it will take a lot longer to "meld" with your new machine.
4 - Go detecting somewhere easy, somewhere not filled with junk and preferably easy to dig.
5 - Go back and read your user manual again - things will make more sense now that you have a few hours on it
6 - PAY ATTENTION to every detail of target response before you dig. The detector can tell you a lot of information but you have to learn its language.
7 - After have put in many days of hunts and learning and feel you have a handle on it, then read the manual again, then start researching on the finer aspects of the adjustments. Learn HOW settings change responses so you can understand when and how much to should be changing them.
OK, now more specifically to the EQX... When you get a feel for its responses, start researching what Iron Bias does, and Recovery speed, and differences in the "behind the scenes" changes of the different modes. I know everybody wants to get maximum performance from their brand new detector, but keep in mind that EVERYTHING is a trade off. When you make it smoother and quieter to operate, you are losing max performance, when you crank up the settings you can easily get overloaded with endless signals and falsing and end up missing those deepest targets because your brain is on overload. Lastly, the factory settings arent going to miss much, if anything. I've always felt that the Minelab presets get you 90% of its max ability from the start. Unless you are hunting in a HIGHLY mineralized location, LEAVE THE GROUND BALANCE ALONE. The ML doesnt need it on anything other than 0.
OK, now go out and hunt some more and have fun!