- Yes, see the silph road analysis of raid drops (it was pre-potions, but the change didn't alter the mechanism, just the drop table). The number of balls determines the number of bundles of items, a bundle being a certain number of an item. I think you got 5 bundles - 3 of golden razzies, 2 of charge TM. That was a VERY lucky raid. The number of balls does NOT change the ratio in which the items are awarded on average, just how many pulls you get.
- Only if your mons are worse than theirs. The fact that you haven't seen the silph road raid reward study (which came out right when the potion change happened) leads me to suspect that you're not making good use of available resources - this in turn would lead to your being generally less informed, and thus making poor decisions about which mons to power up and/or use, resulting in your damage comparing unfavorably with that of others who do their homework.
Are you coming back in after all your mons die? When you do that, it resets your damage count; try to avoid having to do that. Sometimes if I know I won't make it through the whole thing, I use my best couple of mons, flee back to the lobby, max revive them, then come back in, so I will have been using my whole lineup, while most players stayed on until all their mons died, then came back in. Naturally, they don't fare so well this way