You did dox yourself, but it’s not a real place. Here’s all the info you gave:

1. Normal winter temp = -15 to -20C
2. Massive river near you that irrigates fields that feed millions
3. Mountains are nearby, since river is fed by mountain snow melt
4. natural gas fracking, coal mining (anthracite coal), chemical manufacturing, and shale oil extraction
5. major port city 150km away

Really the big clues are it’s cold, anthracite coal, and a major port city. Cold places with anthracite are western Canada, north of Anchorage Alaska, and several places in Russia. Alaska doesn’t feed millions of people, the single anthracite coal mine in Canada isn’t near any rivers that flow to Canada’s breadbasket. So that leaves Russia. They have four major coal ports: Murmansk, Ust-Luga, Vanino, and Vostochny. I’d wager your coal is going to one of those cities that you’re 150km away from. Murmansk has no significant mountains and no coal nearby. There isn’t a river that irrigates a breadbasket either. Same situation for Ust-Luga. Vanino has some mountains, the Amur river is kind of nearby, but there isn’t a coal mining area nearby accessible by rail. Vostochny has mountains and coal mining, but no river. Maybe it’s another Russian port? No, because nothing fits the criteria because it’s all bullshit isn’t it? How can you be 150km from a cold port yet there’s a river that flows away from the sea that’s fed by melting mountain snow that flows to a major breadbasket where they’re mining quality coal? None of it makes sense. It’s not real.

If it’s not real, that would explain your over-the-top reaction to me asking where you’re describing.