Some good points here, and as someone also in the UK, I can see similar things.
There seems to be a definite slowing down in the sense of commitment and urgency to "the message", especially since the return from COVID lockdown.
Ministry group attendance has collapsed. Even on Saturday mornings, which used to be the staple day for house-to-house work, few in each group turn up. I know of several congregations that now frequently combine their group arrangements, rather than meet as individual groups in different homes, because of low attendance.
Elders seem to be less interested in keeping in touch with the congregation outside of meetings (not that this is entirely a bad thing - many used to harass the R&F with unnecessary contact).
I do believe you're right that this sudden "turning down" of the heat of enthusiasm in congregations (what we used to call "zeal" - you hardly ever hear that word either now, from the platform) is very noticeable, and is likely to lead to an acceleration of the decline, especially in more secular countries like here in the UK, where religious enthusiasm has for a long time been seen with some suspicion or even fear.
A combination of greater pressure from the "secular" world - need to earn a good income, cost of living, property prices, etc - has been coupled with the JW Org itself managing to sabotage its own foundation of "preaching" by so many changes to teaching and organisation in recent years, and by refocusing so much on property sell-offs and on video-based "teaching" to create a perfect storm of factors that is killing the "spirit" in the congregations faster than anything I've seen in the time I've been around - probably fastest since the debacle of 1975 (not that I was around to see that).
My generation and younger seem to be pathetic victims of their ailments, using letter writing as an excuse to not face real people in everyday life, then they moan when they don't receive replies to their letters. The point is, they should get their arses out there and stop whining.
The one thing I would say is that this point seems to apply to society in general. This is just the JW manifestation of it. For example, in the last couple of weeks we've had two or three "storms" cross the British Isles. Some medium winds and bursts of heavy rain. A couple of decades ago, that would warrant just a brief comment in the weather forecast to remember to wear a good coat and boots. These days, it leads to "amber warnings" about the weather, and advice "not to travel", etc! Society seems to have become averse to just living normally, perhaps because we've got so used to being cocooned from the "real" world in our centrally-heated bubbles with food delivered to our door and any entertainment we want at the click of a button via the web.
Any form of discomfort or inconvenience is seen as bad and to be avoided at all costs.
Other aspects of some of the things we've mentioned have also changed outside JW-land in the real world - for example, that so many people seem to expect more returns for less effort in whatever they do, such as academic study or secular work - but those very changes within society themselves are in turn working against the JW culture and mindset, making it less and less likely that the Org would attract new people who have any real "staying power". Sure, they may get temporary new "recruits", but how many of those will remain dedicated converts for decades, even the rest of their life, as used to be the case in years past?
When the "going gets tough", few people want to really bother, and especially for an organisation with the recent pattern of behaviour of JW Org.
