I have been producing for like half a year. I've learnt my DAW, Learnt some music theory and learnt what every single knob/button does on NI Massive. I know how to set up things in my DAW and I am getting a good grasp of the composition of chords and melodies. The only things that I suck at and getting really frustrated about is my sound design (specifcally designing lead sounds). Every time i just open massive and design a sound, any sound for example a pluck, pad, bass stab. Whatever. It always sounds so synthesized and so bad. Its really annoying when you have a sound or sound idea in your head but can't create it. How do I make my sounds sound better and not synthesized? I know that's a really broad question but how? Its definitely possible because I know Major Lazer actually use Massive and they make beautiful sounds with it. My main issues with sound design are:

1. What wave table(NI Massive term -> sine, square etc) do I use for a sound? and how to choose one?
2. How do I layer lead sounds properly?
3. How to make sounds that don't sound synthesized?
4. How to get rid of really high static noise in all my sounds without losing high end frequencies

Any help on any of these issues would really help me out and lift my quality of music.

Also I know practicing helps but making bad sound after bad sound is probably not the way to go.

Thanks for the advice. Do you know any places I can learn the different types of synths? Basically I've watched a tutorial on making super saws and I've applied the basic idea to different wavetables to make a more unique super saw sound. Maybe if I can learn what the different types of leads or sounds there are I can just learn to make them and go from there

you can always do research on how to actually understand all synthesizer, and not just specific ones as well.

the specific application, comes with specific understanding. But it also might be beneficial to understand the common components in a synthesizer. your skills can transfer.

also, you'll always get that synthesizer sound, because that's what you're using. these are electric instruments.

best way to add some different character is to add soft or heavy distortion. that helps with the "realness" in one way.

You don't need to learn all the synth sounds that would take forever. You just need to get a grasp at recognising fundamental sounds... for example if you wanted to make a nice pluck sound you might want a sine wave with a low pass filter on it being controlled by an envelope with a short decay/sustain and some nice reverb/delay on it(that could be a starting point) Then from there you could decide if you want it to have a bell like character, which in massive you could experiment with the frequency shifter effect as it creates nice inharmonic overtones, once its tuned correctly. A good way to make sounds more natural though is reverb because it puts the sound in a real space, just don't over do it. Heres a video of the pluck im on about https://www.youtube.com/watch?v=Ea4hw8rC9_Y