Just because they're popular doesn't necessarily mean their users like them.

Lots of people learn and use these languages because:

1 - That's what they're taught at school.

2 - That's where many if not most programming jobs are.

3 - There are a bazillion libraries they can use, compared to other languages.

4 - JS is built in to browsers.

5 - They don't know any better.

6 - Marketing.

Also, many companies want their staff to develop in these languages because of the reasons on this list plus that's what most programmers know, so it's relatively easy to find employees.