I have seen general improvements in Twitter though. Fewer bots, and more features. I think things will level out.
You win some, you lose some. When Elon took over Twitter, he made a number of drastic changes. Some of them were successful, while others were less so. Anyway, his plans are for the long term and therefore I don't think that he will be much worried about the temporary setbacks. The core point here is that Twitter retains a monopoly in its respective domain. There are simply no competitors for Twitter in the micro-blogging platform. And if the situation remains unchanged, the advertisers will return to Twitter sooner or later.
I agree with you, everything is temporary, and people are too hasty to conclude that Elon or Twitter has failed. Look at the previous companies he's run, they've all done really well, so I believe he'll know what to do with Twitter. He spent $44 billion to buy it, he's not a spender without a clear purpose. I am not in a hurry to judge others by their words or actions on social networks, but I just believe in their actions and the results they achieve. Sometimes they just joke around online, but when it comes to work, they are completely different.