Why are fewer English people going to their local pubs for a drink? Are they aware that many pubs are shutting down due to lack of customers?

The pubs with the best chance of survival long-term recognize that they can’t just get away with the same 3 beers, ropey wine and pub-grub. Why pay more for something worse than you can get at home for less?

You have 1001 sources of entertainment on TV and the Internet

Your home has more comfortable seating and a garden

TIFF People’s Choice Award Winner ‘The Life Of Chuck’ Latest Indie To Test Box Office Revival With Neon Gifting Campaign – Specialty Preview - Deadline

A range of alcoholic drinks

They need to offer either food of a quality you can’t get at home (true gastro-pub experience) or alternative entertainments - live music, poker nights, sports viewing etc.

Comfortable seating in a warm, cozy environment, or a nice pub garden

3 Safe Ultra-High-Yield Dividend Stocks -- Sporting an Average Yield of 11.35% -- That Make for No-Brainer Buys in June - The Motley Fool

You can get takeaway or even cook yourself a wider range of food of good quality

In the mid to late 20th century they added food, without the inconvenience of cooking it or washing up.

Back in the day (early 20th century and before) the English pub offered things you couldn’t get in a working-class home:

Popular Processed Foods Linked to Early Signs of Parkinson’s Disease - SciTechDaily

Entertainment (pre TV and radio)

But now:

You can get a wider range of quality drinks at lower prices from a supermarket

Is there such a thing as "left wing fascism"? If not, what is an example of a political ideology that is often mistakenly labeled as "left wing fascism"?

You have to understand what the attraction of the English pub was in the first place.