I think, as someone who had clinical depression in that religion in my twenties, that the teachings makes you feel everything is pointless.
Hobbies are pointless - you should be doing more on FS instead. Travel is pointless, 'we can do that in the new system'. Learning a musical instrument is pointless, 'we can do that in .........
Going to the gym, 'physical exercise is beneficial for a little but Godly devotion' yadda, yadda.
Volunteering or giving to charity - 'you have the poor always with you' and big J will sort out poverty and suffering - any day now!
Reading for pleasure or self education is pointless, 'to the making of many books there is no end and much devotion to them is wearisome to the soul'.
It's nearly thirty years since I read the Bible or a WTS book but this nonsense remains in my memory. This cult destroys our joy in life. They rubbish everything that gives any pleasure to human existence. I had the phrase 'what's the point?' in my head for many years notalone. Can you wonder that people take their own lives?