No response yet...looking more and more like a troll post.

yea, exactly...... 3 years of saving money for a gpu only to find older games not working and modern games less and less appealing ... thank god, there are those dufus developers that manage to make even a single dot cost you all your horsepower........ ( if rained unchecked)<reigned?=)

Not that it's not entirely possible for the games themselves to cause these issues, but you may also want to check your security software and settings.
For example in my case, I have (a very old version of) Comodo Firewall with HIPS also activated and set to be strict and very "chatty", so I'll know what's going on and get to decide what should happen, but full screen games are, well, full screen, so if CFW wants to prompt about something the game tries right after I start it, that popup won't be displayed and the game will be frozen until I reply, locking the system until the popup times out. And there are usually a series of popups. Took me a few instances of thinking the game locked my system until I realized it, way back, and since then on the first runs of a newly installed game, if I can't set the game to run windowed and be able to see the popups, I set the popup timeout to 10 seconds and then wait it out, see in logs what it was prompting about and make the necessary settings, see what I want to allow and what to deny.
So check if it's not something similar in your case too, depending on what you use or how your system is set up.

Just a reminder that OP has "zero" games on his account.

I know that some time ago GOG had a "zero games" bug on user's profiles. I'm not certain if that bug has been fixed but I suspect it has.
Still, sometimes it's useful to check posters user profile, just in case.

My account was affected by this bug and is showing me as having games, which means that it was fixed.

Some people create fake accounts so they can rant.
I'm too lazy for that.

Yes, the bug was fixed.

Oh, is it?
Good to know. That helps weeding out the trolls from the real customers.

I can only speak for myself, but I admit I was glad when GOG created the "see how many games X owns".
Not for vanity reasons, obviously. But because it helped immensely to recognize who were the honest customers and who were the retarded trolls.

It also helped to em notice some interesting stuff... Like how so many of the "GOG sucks and must change or will buy elsewhere" group were people with very, very few games on their accounts and low financial investment on the store. But I digress.

No it's not.

If you say so (check attachment).
I was affected, had a big fat "0" there for months.

Have you added any games to account (free or paid) in past couple months? AFAIK it's fixed for anyone who did.

Yep, that triggers the update of the number and was how it went to 0 in the first place :)

No my last bought is December.

Good to know if I buy smth soon, it'll be (hopefully) fixed.

It's enough to add Deep Sky Derelict from giveaway, or any demo/free game.

Old games don't have widescreen resolution, as it wasn't available back then.
If the game has 3D graphics, most likely you can make it run in widescreen. It doesn't take all day long, usually 1-2 minutes is enough. Most games have some HOR+ solution available.

Most likely the answer you are looking for is here:
https://www.wsgf.org Adventure games are best played with some third party software, which in most cases is ScummVM.
ScummVM lets you configure how the game is run, for instance, whether the game exits to ScummVM launcher or closes ScummVM when exiting, whether the game runs in fullscreen or windowed, what scaler is used, and so on.

You need to configure your ScummVM a little, GOG installation doesn't offer much more than basic solution to run it. I haven't yet seen a GOG game that completely refuses to run.
Some require some tweaking, but generally speaking not much more than they originally did.

If this were "the good old days", you would be spending a lot of time with autoexec.bat, config.sys, settings.ini, and what have you.
With GOG, you don't need to do any tweaking most of the time to get the game running, but you probably want to spend a few minutes to make the game run the way you want.

If this is too much for you, then perhaps retro gaming is not a hobby for you.