GTA 5 closing after a couple mins

[aFeect]

Hey, any ideas what could be causing this, or how to fix it? I'm sorta out of ideas and I'll try to provide as much info, maybe one of you had a similar problem.
I have a steam version of the game, latest drivers on everything from graphics drivers all the way down to chip, bios and so on... Specs: GTX 1080 Ti, i7 7700K, 16GB Ram, game is installed on 1TB nvme samsung 970 evo plus SSD
Mods:

1. REDUX with reshade (WORKED perfectly fine with JUST THAT)
2. 2 car mods https://www.gta5-mods.com/vehicles/bmw-m5-e60 and this https://www.gta5-mods.com/vehicles/2018-maybach-s650 (I had some issues when I installed them, game was crashing)
3. Found a fix or at least I thought I did, game could finally start and run for 2 - 3 mins before it just closes and I'm on desktop, no error msg or anything. Downloaded and installed these:
   https://www.gta5-mods.com/misc/gta-5-gameconfig-300-cars
   https://www.gta5-mods.com/tools/heap-limit-adjuster-600-mb-of-heap
   https://www.gta5-mods.com/scripts/heapadjuster

I'm using default traffic files from Gta Config v25.5 for v 1.0.2245.0, heapsize tried all the way from 650 to 1500.
Mods are installed in mods folder, except for heapsize and I think gameconfig, cuz it didn't work when I installed it into mods folder.
Also forgot to mention that I've verified game files, everything was there, nothing missing.