Me. 45 hours into game. I reached 7th Heaven, talked with Voronin, agreed to take his missions.
I started with Northern Saboteurs. As suggested I didn't kill them (well, I did but then just loaded autosave) but instead pretended I am a friend and received VERY SECRET SUPER CODE. Took me around 5 minutes to decode it. Ceasar code, shift 22. My cats could solve it. Spoilers ahead:: I moved to location mentioned in coded message, killed overselfconfident clown and his peers, went out and ....

I am done. I hate this game, I hate devs, I hate myself.

SOMEHOW MOVING TO LOCATION TRIGGERED ENDGAME SCENARIO BEFORE I WAS ABLE TO DO OTHER MISSIONS FOR VORONIN AND VISIT UNDERGRAOUND FACTORY WITH RAILGUN.

AND because I am an idiot I only had ONE SAVE now overwritten in feral location. BOTH autosaves are useless too cause are now after point of no return. HOW CAN I REVERSE IT?

HELP! PLEAAASEEE!!!

OK.

I helped myself. If somebody else will need it: Dev Console (0 + . num, both ZERO and DOT on numpad, then type: youshallnotpass) command changelocation worldmap