Am I the only one who is experiencing this issue?

Actually, sign-in process is slow too.
It takes quite long for the sign-in pop-up to pop up.
After that, it takes forever to download GOG GALAXY?

What's going on?

Good thing one does not need that buggy thing (the Galaxy client) in order to play the games.

Yet

Regarding the OP query, it happens at times, whether through Galaxy or browser. Must have to do with their cdn.