When Galaxy 2 was released 2-3 months ago or something, I totally loved it, but recently it's just a mess. There must be something that you released in the last 4 weeks that totally destroyed the application. Notw it's VERY VERY unpleasant to use.
When it was released, it was fast and looked nice and smooth. Now it's just disaster. It barely does not even work to scroll through the games. There is some duplicated line to the left when you scroll down the games that stays for 2-3 seconds when you stop scrolling. Cutting all the images 20px on the left side.
When you press the "play" button, there is no Hover effect on the button and when you click you don't really understand if you've clicked the button or not since it's so bad UX on that button.

The "Settings" button to the right of the play button barely works at all. I click it, don't know if I've clicked it. After 5-10 seconds!!!! the menu appears, but it looks very shitty. And when I navigate on the popup menu, I don't really know where I am and everything is just slow. When I press like "Open game folder" it does not work at all, nothing seems to work properly with that button.
And the image of the button is just totally wrong. It looks like volume settings or an equalizer or something. Where's that standard cog wheel?

It was so great 5 weeks ago, what did you do since then? Whatever release you made, please rollback to a previous release or fix the issues :)

Well, according to the changelog within GoG Galaxy, 2.0.12 Beta from December 18th, 2019 was the last update, and the files in C:\Program Files (x86)\GOG Galaxy on my computer haven't been changed since then. So, unless you somehow got an update that I haven't gotten and can't find anything about online, you should still be running the same version of GoG Galaxy 2.0 that you were running five weeks ago.That of course doesn't mean that you're not now running into problems that you weren't hitting 5 weeks ago, but since there hasn't been an update yet this year, it seems highly unlikely that your problems relate to an update if they started this year, though you certainly could have had something happen to exposed existing bugs in Galaxy that you weren't hitting before. It may be that your install got screwed up and reinstalling would help. Regardless, if you click on the gear icon in the top-left of Galaxy, you can select "Report Issue" and/or "Support" to complain to them directly. If the problem stems from something having gotten screwed up with your install, they may also have suggestions on how to fix it beyond simply reinstalling.