"Some energy from detonated warhead spent on axis destruction and freeze moment for engine part. It 30kg of RDX."
The warhead is in axis of the missile, the engine is massive and going Mach3. No reason to turn so sharply as if the warhead detonation was to the side of the engine, and not in axis.
On your picture the front part of the missile (seeker, electronics) went straight. Why didn't you draw it turning, too ?
In any video from practice missile interception the remains of the missile are continuing straight after warhead detonation, at least for hundred meters.