Hey Krussi!
Long time man.
I didn't know you were moving into hardstyle. I dunno if it's a good move though, and here's why:
-your previews sound too happy, since they use generic chord progressions too often. Hardstyle tends to just stick with one chord, except at the final break. 0:34 was a good example of a good sounding hardstyle idea, since it's quite repetitive (that's good).
-your synths still sounds too trancy/hands-up to be 'hard', I think another reason for this is because you're using a lot of block chords (like your 2nd and 3rd which actually sound wayyy too similar). Try making simple melodies that flow well and that are about 2-8 bars long.
-the overall mix sounds a tad light still, needs to have more power, especially on the low end. The kick and bass is what normally drives the track in hardstyle. The lead usually sits on top or blends into the rest of the track (through side-chaining) depeding on the style.
Nonetheless, I know you're new to this genre (as am I, I don't really make it either lol) but I've heard my fair share of hardstyle since my friend has a shitload of it :3
Keep at it man, I'm sure they'll go somewhere. :]