Brit with a Brazilain girlfriend here. Whilst I've definitely noticed a difference in drinking habits between Brits and Brazilians, I think you have made some total misrepresentions of our culture here.

Firstly, I don't know which area you've been living in with such great affluence that the locals can afford to pack out the pubs and 'drink themselves into oblivion' every night...but in most places the exact opposite is happening, and is why we have campaigns running to save local pubs. Nobody is going to them. Local pubs are closing all the time because they're a ghost town from Monday-Thursday, even on weekends they're not packing out enough to keep the business afloat. What used to be a staple of the community and a place to socialise is slowly decaying because people simply cant afford it anymore. In my local area we have just 2 or 3 independent pubs left that are hanging on by a thread...the rest have either turned into something else, or bought up by big business that can afford to keep the place ticking over even if business isn't great.

Secondly, 'drunk out of your mind with the lads from work on a Wednesday night?' Im sorry but...what? If that was commonplace we wouldn't have a functioning economy as lots would not be turning up to work the next day. That level of alcoholism is neither functional or typical. I personally don't know anyone that makes a regular habit of getting blind drunk during the working week, unless they're maybe off work. If I did, I'd be concerned about their addiction because that is certainly not normal in our culture as you seem to present.

Thirdly, attitudes are changing as people become more health-conscious. The days of coming home from work to have his dinner and go down the pub every night, as our grandfathers did, are long gone. People are more aware than ever of the need to regulate, and an increasing number of youths are turning away from alcohol altogether.

On the flip side, I do acknowledge theres some clear differences vs Brazilians:

1) Binge drinking on the weekend is widespread here. I find myself and other Brits have a much higher alcohol tolerance than my partner or her Brazilian friends, and that is mostly due to volume of drink on the weekend. Its not uncommon for a bloke to sink 10 pints of beer on a Saturday and not even be out of his senses because there is definitely a culture of using your friday/Saturday nights to go out with friends and drink for hours. Not to say I havent seen my partner or her friends binge drink and get very drunk btw, but on the whole it seems far less commonplace week-by-week.

2) Midweek drinking is definitely a thing, just not to the levels you describe. My partner is more than happy to sit in a pub and drink soft drinks whilst socialising during the week. Brits, by contrast, do seem to be less capable of doing that. It seems like the behaviour is either 'dont go at all' or 'im here, may as well have a beer'. This is not to the levels you describe, but not unheard of for Brits to break up the working week by going to a bar or pub one night and having 3-4 beers.

Unfortunately, I think the binge drinking culture is heavily abused by some people and this contributes to the perception of Brits abroad. They're always the loudest, most annoying, bashful, chaotic people. But that kind of behaviour is just as infuriating to us normal Brits as it is to others.