I don't know where you are from but most universities in the U.S. teach Java or C++ as primary language. Pretty much everybody in our school used Java as their interview language and due to the leetcode grinding culture, the interviews are not definitely easy. The companies you talk about sound like they suck.
It is easy to write that the company sucks, but the problem isn't that easy.
When you work as a manager for the company and you are presented with a new project you can't say you will not do it. In many companies this will mean you are expected to hire people and to get it out the door.
In most companies incentives are against "we will ACTUALLY only hire best people".
Usually true for graduate hires but lateral hires of experienced devs are more uneven in quality. Where I work, campus recruits are like geniuses, while some experienced engineers are just buzzing through. I remember one of them told me he never used github, after working for 6 months, when we have github enterprise in our own company
