If you think Fruity Loops is too complex, you won't have much luck with the alternatives considering it's regarded as one of the easiest and most intuitive to use programs. I don't think there is really any serious tool out there that doesn't have a significant learning curve for complete beginners.
There are plenty to choose from today, and they pretty much all carry strengths/weaknesses based on their roots. Fruity Loops for example started out as just a virtual drum machine which has since had more and more features and functionality added to it. Generally suited for dance music but you can create anything you want with it. Cubase, Logic (Mac only if you want the latest versions), and Pro Tools are all fairly similar to eachother but the former two started out purely as MIDI editors while Pro Tools was solely audio recording from the start, and you can sort of tell (I've experienced all sorts of weird bugs when doing heavy MIDI stuff in Pro Tools).
Another popular one aimed more at electronic music is Reason, its niche being that its interface simulates the jungle of cables and wires you'd work with in a physical studio. Then you have stuff like Finale and Sibelius which is for more traditional sheet music/staff writing.