I think you messed up a little here - if you bought these on someone’s recommendation - either the advice was old or they haven’t been in the hobby for a while.

I agree with other comments about it being better to consolidate and buy one good headphone rather than buying multiple cheaper ones.

My 2c - return everything but the APP and get a good Senn open back (HD6X0 or HD560s) and get a different IEM - something like a Hexa is like endgame for most people for $80)