Or you can just wait a bit that things settle down to do it, since the event last until 5.4. You were never in an obligation to get all the rewards under 3 hours since the event release. People were already doing the same mistake at the previous iteration, trying to rush all the fates the quickest possible despite the event being several weeks long, which ended with quite a few players getting a burn-out. Especially if you don't like fates that much, it is better to do only a few per day.
For the loot rate it is RNG as usual. Your numbers means nothing with so few trys, you need several thousands of them to get viable statistics. The fact that i did see someone get his suzaku mount on his first clear doesn't mean that the drop rate should be nerfed. Or like these fates crystals relics, sometimes i get them on the first try, and sometimes i need ten of them. It is all good or bad luck really.
And if you are impressed by this event so much, well, don't even try to get my 10 000 fates title XD