not sure why fallout 4 runs poorly. bought on gog i have it on steam and its uninstalled. gog version is installed and i only get 20 fps. nothing but problems with gog

Depends on your gpu. Mine runs better without the steam launcher. Steam forces the use of AMD drivers and OpenGL.
While i own a 980 and a 3060, both factory overclocked. And i like them to stay factory overclocked. Also steams launcher bloats, and leaks like a sieve.
You need a High FPS mod. The game was made to run a 30 fps, not 60 fps. Also check if you have weapon debris on. Most cards cannot handle it. Cause the decals and weapon debris also cast a shadow.

The unmodded game has physics issues when it runs above 60FPS. There are mods to fix this, or you can set your monitors refresh rate to 60Hz and that fixes the physics issues. However, even with the Steam version, when doing this, load times are significantly longer.

I've played this game since it came out, and for literally years I thought something was wrong with my controller because I could no longer jump as high as I used to as I found places I had reached before suddenly being unreachable, and there are other issues as well when run at high FPS. It wasn't until I lowered my refresh rate from 144Hz to 60Hz that it ran great,... BUT, that's when I noticed the load times increased significantly. I have no clue why refresh rate and FPS affects load times, but God as my witness that's what I saw. I mean the increase in load times was very significant.

So that left three choices: 1)play with messed up physics but better load times, 2)Play with messed up load times but better physics, or 3)get the mod that "fixes" the high FPS physics problem.

I chose option 2 as I do not want to mod my game at all, but most will likely choose option 3. Be warned though, if that's the option you choose, you will need to use an additional mod if you want to play survival mode, because IIRC (could be remembering this incorrectly I admit) survival mode doesn't allow for mods. So if you want to play survival mode with option 3 above, you will also need a mod that makes survival mode allowable even with mods.

ADDED: Wait, scratch that, maybe it was achievements, not survival mode, that wouldn't work with mods. Dammit I'm not sure, my memory sucks.

turn off vsync

FPS does affect FO4 load time, it's a known day 1 problem. It's so bad, that I don't understand how they got away without fixing it.

Bethesda Games are barely functional bug fests, held together with the hopes, dreams, and work of community members.

I bought FO4 as soon as GoG got it and have been playing a fair bit.

One of the first Mods I installed was "Load Accelerator", to fix the Horrendous load times. I'm on a 60Hz monitor so running 60 FPS, and load times were ridiculous.

What the Mod does is turn off Vsync during load screens and crank the FPS to 350 FPS, then Loads zoom by, and it drops back to 60 FPS after the load screen.

Note that in Fallout New Vegas. Intel's new GPUs (Card or Integrated) mess up VATS giving 0% to hit even when it should be 95%. I can't imagine how the GPU drivers could change your VATS scores, but leave it to Bethesda to make such weird bugs...

You are asking the guy for "proof"?
Like why would anyone lie.

People make assumptions based on their subjective feelings all the time...