I give up. Steam integration is always failing. And in my case, it also crashes the whole client after a while. I have reported this problem several times to no avail. I'm sick of it, and that's why I never launch GOG Galaxy anymore. In fact, I've stopped buying GOG games for this reason. Galaxy is a pain in the a**.
This has nothing to do with Galaxy. The Steam integration plugin is a community plugin, which is NOT maintained by CD Project, like the official Epic plugin.
Still ... you have all the right to be dissapointed, to not use Galaxy anymore, even to not buy from GOG any longer. I too use Playnite again, where the lonely developer managed to integrate Steam WITHOUT triggering Steam Guard protection to kick in and block all access to the client.