I’ve had an issue where steam will not open up. I’ve found the issue to be to be with Nvidia-settings. When i open up nvidia-settings there is not much content. To fix the issue i reinstall nvidia-settings and it goes back to normal and steam opens normally. This fix only works until i reboot and I have to reinstall nvidia-settings again for steam to open.
In the first picture I think you’re using Wayland, while in the second one you’re using X11. I too have this problem with Steam freezing while opening on Wayland, since I updated to Nvidia 535
I can assure you that both pictures are x11. I’ve not had an issue since I moved from GNOME to KDE Plasma.