From your grub menu, the "Advanced" option should offer an earlier kernel. If the problem is really the 5.5.3 kernel, then it will boot an earlier kernel, and from there you can work to discover what is wrong (review /etc/X11/xorg.0.log for example).
If it won't boot and start X from an earlier kernel, that will prove that the problem is not the 5.5.3, it has to do with the video driver.
Also, when the grub menu appears. with the top line highlighted you can touch "e", then move the cursor down to the end of the kernel boot line and add "3", then do Ctrl-X to boot to the tty 1 login prompt.