c has no memory management, its for the programmer itself. so if i a c program has bad memory management it's not the language but the programmer. (admittedly not easy to get right if you need to do it yourself.)

C is specific in that it tries to give a good direct interface with hardware. If working within other software like an OS, it's tedious, as there's a lot of things outside of C itself to take into account. Again, not a downside of a language, but the way it is used.

Javascript has no relation whatsoever to C, in its design nor implementation. it's a scripting language :/.

C is far superior than a lot of languages, but it's often badly applied giving it a bad name. It has a more limited scope in todays world of rapid development on top of operating systems. For embedded / bare metal systems it rules the day and there's barely an alternative unless the bare metal provides excessive resources to allow for things like c++ or rust which add a lot of overhead to systems to provide more ease of use. (i.e. not always worth it / possible depending on the system its targeting.)

assembly would be a good alternative to C, but it's incredibly more tedious, where C is a good high level repalcement for assembly, which is what it was designed to be.

C is great, just don't use it if you don't need to use it.