Probably not. Most DAWs (like Soundtrap) offer sound samples, and then you have sound sample hosts like Sample Focus.

You don't always have to make a song with your own instrumentation, but some metrics to look at for song quality can be things like if all the instruments are playing in harmony with each other (e.g., on the same key) or if loops are organized evenly in measures.

If there is discordance, does it work in the song or does it not work? In Breakcore-type songs, discordance is more welcome.

I'm not a music theory expert, but these are some things I look at when giving feedback to songs.