Not your EQ. That grossly undershoots the Harman target.
Maybe, just maybe, the Harman target is also a problem. I know that's hard for some people to hear, because they assume it must be "right". We have another thread going for that. Mine ends up closer to Etymotic or IEF and it sounds worlds better. The highs are all there, without being glaring or fatiguing. And the mids are much better as well. Even when the Zeros are brought down to Harman, they still sound awful to me and music is not enjoyable. You can try Crinacle's AutoEQ to both Harman and IEF to listen for yourself. More people need to do these experiments and report their findings. And they need to use the right material. Slow jazz, for example, or just a solo voice, will NOT reveal the problems. Music that is closer to full-spectrum, or pink noise, is best. In fact, Anthony Grimani just uses pink noise itself. I'm not trained with pink noise like he is so I use material that is dense and covers the full spectrum, backed up by sweeps to identify resonances. When I AutoEQ to IEF Neutral, it sounds close to mine, only you need to add the bass yourself. The bass contour of my EQ matches two subwoofers in a room, +6 dB at 20 Hz, merging down by 100 Hz. Music that reveals congested mids on some speakers and IEMs when the bass extends too high, is perfectly clear here, with bass that hits hard and goes deep when it should.
Look back a few posts where I showed what I hear with the Zero stock tuning. That Polk speaker measurement is awfully close.
P. S. Is there a quick way to toggle everything - all the changes - on and off in Equalizer APO?
I am using PEACE on top of APO and there is an ON/OFF toggle at the top right corner. If EAPO doesn't have that feature, I would try that. Also, I'd like to know if what you get from that sounds the same as Wavelet.