Worst interview experience of my life.
Asked me to turn on my camera, without him turning it on.

He asked me 1 question
I was given 2 strings s1 and s2, I have to find if there exisits a substring in s1 which is anagram of s2.

I explained him intially with the two pointers approach, he told me to THINK IN DIFFERENT WAY.
I mean, without understanding or discussing over the approach he asked me to think in a way in which he memorized the solution.

I started thinking in XOR way, I have a habit of thinking out loud in interviews and it backfired in front of this moron.
He was taking my statements as if this is the final statement and wasn't allowing me to re-iterate.
In the process of thinking XOR method I discovered a better way to solve it. I wanted to discuss that with him, after lots of efforts I was finally allowed to discuss it.
At the end he told me to code the first approach I came up with (2 pointers)
I asked him that the one which I provided recently is more optimised one than the one which I provided initially. But all in vain, he insisted to code the first approach only.

I started to code. Again I have an habit to explain every bit of code which I am coding. He told me to shut up, and just code the solution. The code should be self sufficent. Finally I coded the solution and he went away without discussing anything. Neither did he asked me if I have any questions. He just told straightaway that he is copying the code and then left the meeting.

During the interview I think he was also trying to take credit for the optimised approach that I came up with later. He was asking again and again that "How I was able to figure out the second approach?"
Such a childish guy.