Over 500 Giveaways Entered, still no luck a year later.

You can't really complain, private giveaways and group giveaways are the ones in which you have more chances to win.

500 giveaways is barely anything.
I got lucky and won really quickly (32nd entry I think) but most users get their first win around 1000 entries

8134 entries and only 16 wins,patience is the key my friend.