Same here re EQ but I went even a step farther. I EQ'd them post-HearID and then added a bit more tweaking using the Kaiser Audio app (which I use to play all onboard music tracks on my iPhone 13 Pro; doesn't work for streaming services). I know, sounds crazy. Two different EQ apps running simultaneously. But guess what? It works! I now am going to keep the L3Ps for using outside the house, which is almost the only time I use TW IEMs. At home, stick with full-sized phones, both TW and wired. Only exception at indoors is the Ety ER4XR], amped.
Anyway, should a person have to jump through EQ hoops to get a TW or any headphone for that matter to sound its best? Nope. But for me, persistence paid off.