ANC has technical limitations, what magic did you expect? Chu's are like a 2 in a 1000 iem that should've cost at least 80€. I'd argue DSP makes them superio, fit is unfortunate, they work just fine in my ear. Genetically more fitting for me.

A good solution is Fiio bt amp dac you can hang around your ear and use on any IEM with 2 pin or MMX.

Good, cheap overear BT are Mpow or AKG's.