The charts are usually filled with popular pop songs and there's a good reason why. Even though the songs are pretty simple in terms of sounds and instruments, it's what makes them so memorable and addictive. It's why they all also sound very similar with very similar sound effects.
As music has developed so has the technology with it and it's become easier than ever to create your own music that can sound like it's come from a professional artist. Brett Domino is a YouTube persona created by Rob Madin, where he purposefully makes satire videos with a geeky character. He has created his own guide on how to make a hit pop song and it's excellent.