[ WARN:0] global ../modules/dnn/src/dnn.cpp (1363) setUpNet DNN module was not built with CUDA backend; switching to CPU After 5 OS installs and over 10 OpenCV builds

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  • OpenCV => 4.5.2
  • Operating System / Platform => Ubuntu 20.04
  • Compiler => Visual Studio Code (cmake)
  • Cuda Version => 11.2
  • GPU => GTX 1660 TI
  • CPU => Ryzen 5 2600
  • GPU ARCH => 7.5
  • Cudnn Version => 8.2.1

I have built OpenCV over 10 times, and even went as far as to install the OS 5 times (This was to get a new fresh install of Linux to erase any mistakes I made), I have been on this problem for over a week, followed three installation guides on how to get OpenCV with Cuda support on DNN.
Here are the step by step guilds I followed.

I have tried cuda 10.1, 10.2, 11, 11.2 and 11.4 to no avail. I have tried different gpu arch and even build opencv with ever single arch at once yesterday, but I still get the same error after all of this.
Here is the error I am trying to solve:

[ WARN:0] global …/modules/dnn/src/dnn.cpp (1363) setUpNet DNN module was not built with CUDA backend; switching to CPU