Slowfinger is spot on. There's no such thing as an unlucky good bowler. As golfer Gary Player once remrked, sportsmen worth merit make their own luck.
Judging by your OP, I reckon you are a predominantly outswing bowler. I had a similar problem when I was younger that I could ony bowl outswing and used to beat the bat a lot rather than actually running through sides. Two suggestions I can offer:
1) Develop variations: A proper inswinger or even a slower off-cutter would be perfect. The SG balls that we use in India get roughed up quite easily and depending on your action, reverse swing (both ways) is something you can work on. You'd discover, much to you joy, that once batsmen are unsure of which way the ball is moving, you'd be getting a lot more wickets off tentative strokes. Very few club batsmen, in my experience, can play the late inswinging (conventional or reverse) full length delivery well enough.
2) Watch your length: If your bowling is like Peter Siddle (or Mike Hendrick, going further back in time), then chances are your length needs to be fuller. A shorter length ball
seams more and misses the bat, while a fullish ball would
swing more in the air and the batsman has less time to make an adjustment.
If you bowl a good length, move it both ways and have a good bowling acumen, I find it difficult to believe that you'd be consistently unlucky. Cheers to a season full of wickets!