For what it's worth, I find the game to be not too difficult. Galak-Z nailed that sweet spot in my eyes and what likely throws people through a loop more than anything else are the controls being different from the norm. I went through Season 1 on my first go without much trouble and almost succeeded in Season 2 immediately afterwards, but admittedly I also played more passively than I do now since I hadn't wrapped my mind around the spaceship / mech handling yet. Once I moved past that hump and got accustomed to various other intricacies, the game felt very doable. It requires a specific mindset to do well in.
I also wouldn't put Galak-Z in the same league of challenge as titles like the Souls games (even though the difficulty there is overstated too), Volgarr the Viking or Spelunky either way to name a few recent examples; those present some genuinely tough walls to overcome and punish you far more if you screw up. I'm hesitant to mention Binding of Isaac alongside them, since while it isn't easy-going as well, at least half of the challenge there originates from the fact that the player character's abilities are deliberately shit and progression via the strength of your item pool boils down to pure luck, opposite of the above three.
If others find Galak-Z too intimidating to hop into or can't put much time into it to improve for whatever reason, then that's fair, but you guys haven't done wrong with its balance.
