Here is what to notice. Revenue has gone up very nicely - from $664 million to $2.2 billion and is still increasing. And costs have gone up commensurately. Losses seem stubbornly stuck at half a billion per annum. That is real money - just burnt - and burnt by a business that is already established.(Your occasional reminder that I'm active on Twitter.)
In other words costs have gone up by $1.5 billion give or take something. That is billion with a b.
Now if costs were rising that fast and the service were noticeably improving and engagemet growing then you could be tolerant.
But - as a pretty dedicated tweeter (with almost 20 thousand followers) - I have noticed almost no changes in twitter that improve my user experience. It is almost impossible to find out what they spend that $1.5 billion extra per annum on