I have no idea about the big 4 working environment
But, I can only say that the first part of what TS say is quite true.
Starting from the middle part of his rant is what I called symptoms from a spoon-fed graduate. Luckily my experience is vastly different.

To put it simply,
starting in the field is the hardest, in the first few months you need to put at least +12 hours per day for your work.
After that, it is smooth sailing as you understand the logics and workflow behind your job scope.

Remember, just because nobody want to teach you anymore doesn't mean you should stop learning and improving yourself.
Remember that the company DO NOT OWN you a living.
THEY RATHER you just kuai kuai do your job forever until they don't need you anymore
So its up to YOU to make yourself NEEDED and USEFUL to a lot of companies to give yourself more options and advantages in life. This is probably the hardest thing anyone ever do
And boredom can always be cured by climbing the corporate ladder and taking stress-relieving hobbies.