How to downgrade my kernel version

You can use terminal with apt command and install the previous kernel you need.
For example, let's say you want the 6.5.0-41

sudo apt install linux-image-6.5.0-41-generic linux-headers-6.5.0-41-generic linux-modules-6.5.0-41-generic linux-modules-extra-6.5.0-41-generic

You can set it to default boot to prevent upgraded kernels from booting:

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