Genius, I read up to scene 7, which isn't bad when you consider I haven't got a clue what it's about. I thought the writing was pretty good and I did laugh a couple of times - and most importantly, didn't groan. Imagine Hugh Dennis looking a the Vodka bottle and saying 'those damn Russians', and you can see that it could work. The idea that the son keeps pestering his dad to buy him porn is also a pretty rich idea.
On one attentive - but uninvolved - read I would say that there didn't seem to be much difference between the father and uncle's lines. I didn't get any strong visual pictures through the dialogue. And where is it going? I will probably read the rest of it at some point, but you must have a few lines at the begining outlining the relationships and what it's about for potential readers. You've been living with it for ages, but we haven't.
Cutting is always a good idea, and i would say cut everything to the bone. You may have to invent more plot, but if a scene sags - even for a few lines, you've lost the reader.
It starts well, however, because you put us in a situation that we can recognise immediately - a drunk man returning home, and that is worth a lot. I've lost count of the scripts that I've read that start with some incomprehensible activity or dialogue, that is intensely irritating to the casual reader.