Loot Boxes don't give skin shards as often as the drop rates say they

So yeah, I've opened around 10 boxes in the last 30 days and I've gotten 2 skin shards and 8 champion shards. It's funny cause Riot released drop rates for the loot boxes saying that skin shards drop at 45% frequency and skin shards at around 15%. I can see that this is not the case. All my friends also get only champion shards extremely more often than anything else. Why would Riot lie to us? And is anyone else experiencing a surplus in champion shards?
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