[Nextgrid]

Practice could help; you are lucky to have a job where they are happy with you so you don't really have the urgency of landing another position right away. Maybe apply to other companies (even if you don't intend to actually take the position) and practice during those interviews. If you succeed, it'll make you more confident for the next one, if not, no big deal, you have nothing to lose.

With regards to "modern" tech interviews specifically, that has nothing to do with social anxiety per-se, even I can't do these despite 7 years of experience. There are 2 ways to go about this:

1) You embrace the problem and work to solve it. Grind Leetcode or similar resources about bullshit algorithmic interviews until you are good at it.

2) You avoid companies with such bullshit practices. Most companies will let you know in advance what the interview process is like (and if not you can ask), and you can immediately refuse and explain your reasons (they'll often make exceptions for the right candidate especially in a hot market like today).

There was a recent submission about these interview challenges which I suggest you check out: https://news.ycombinator.com/item?id=29804607