Disappointed with TANGZU Wan’er

I’m no expert. I just listen to music and I don’t know the lingo. I’m new to IEM. I just know them as earphones. I’m almost 50 so I know what is a Walkman, CD player and MD player and have owned them all when they were popular. I own some headphones too. Bayerdynamic 770, T1 and A1 amp, Gredo 325. I normally listen to my stereo. A Quad 909 pushing a pair of Herbeth Super HL5 speakers. My old Sony earphones died. They were from about 10years ago that cost about US$250. I purchased a pair of TANGZU Wan’er after reading glowing reviews from experts. I’m surprised that prices have come down so much. A cheap pair of earphones having such great reviews. Boy oh boy! Was I in for a surprise… this POS earphones. Nice packaging but sounds really disappointing. No details, male voices sounds like robots, no soundstage, can’t even tell if it’s in phase or out of phase. All these YouTube experts…..

Now please advise me, what earphones should I really get? I just got myself a Sony Walkman 707 and will be listening with that.

Thanks!

Edit* additional info This is how Harbeth Speakers are described and I want iems / ciems that sounds like my Harbeths.

Harbeth speakers are known for their natural sound, clarity, and detail. Reviews say they are transparent, vivid, and dynamic, with a smooth treble and well-integrated midrange. Some say they are easy on the ears and can convey the musical message convincingly at low volumes.

Sound characteristics Natural: Harbeth speakers are known for their natural sound. Clear: Harbeth speakers are known for their clarity. Detailed: Harbeth speakers are known for their detail, especially in the midrange and treble. Smooth: Harbeth speakers are known for their smooth treble. Well-integrated: Harbeth speakers are known for their well-integrated midrange. Easy on the ears: Harbeth speakers are known for being easy on the ears.

Musical performance Lifelike realism Harbeth speakers are known for their lifelike realism, particularly for well-recorded natural instruments and voices. Lush euphoric sound Harbeth speakers are known for their lush euphoric sound, particularly for wooden instruments and female voices. Precise imaging Harbeth speakers are known for their precise imaging, including movement of performers.