More comment needed but:

High side FET is underdriven by 220R at other than near DC.

N Channel high side gate drive must be above +V by Vgsth + some.
Depends on FETS.

High side pull down of 10k is much much too high.
Add reverse diode across BC847 be junction so driver pills gate down BUT
then watch gate -ve voltage - zener acting as forward diode will clamp
this, but slowly.

Overall I'm afraid that this cct needs enough work that copying something
else that is known working may be easier.

BUT persist if you wish and we can journey with you.


          R
--=20
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