The Me 262 A-2a should be 6.0 instead of 6.3 because the speed and turn time is lower then prop planes in the same br and even 5.7 br planes outrun the Me 262 A-2a in turn time and speed.
Right, make it 1.0
Actually, lets make a completely new, negative BR for animals like OP.
That oughta keep things in balance