Some synonyms for mediocre: decent, middling, ordinary, so-so. It can mean inadequate, but it can also mean adequate.

Another common synonym for mediocre: has no place on a software development team. Not technically correct, admittedly, but that's how I read that word in an software engineering context. Adequate is not good enough.

I’m just talking about how I view/use it.

“Mediocre” is one of those words where common parlance doesn’t quite line up with the textbook definition. e.g. from the Oxford English Dictionary: “Of middling quality; neither bad nor good...”