GPU is slower than CPU on my wsl

system details:
windows 10: 2004 build 20175.1000
wsl 4.19.121
ubuntu: happens on both 16.04 and 20.04
cuda-toolkit on winsows 11.1
nvidia driver: 455.41
GPU: nvidia geforce gtx 1070
on the linux I installed: cuda-toolkit-11-0

I did everything as it was in the guide.
and I ran this Tensorflow notebook as a docker container:
docker run -it --gpus all -p 8888:8888 tensorflow/tensorflow:latest-gpu-py3-jupyter

when I use the GPU, it’s about 3 times slower than CPU. What could be the problem?

First of all you need to update your nvidia Cuda Drivers to the new 460.15 and also your WSL2 kernel to 4.19.128.
(with wsl.exe --update from elevated cmd)

Thank you for your answer.
However, I did those steps but still, and the GPU performs poorly.