sucess at party room?

well it started yesterday i went to a drop party that was 243mil

i was one of the first ppl there, sat there for 10 mins as it got crowded and right wen the ballons drop i lag out

i was so mad

afterwards wen i logged basck in i tradeed wit ppl and it seemed like a select few got all the loot

so i ask...how do i not lag out wen theres 100s of ppl in the same area moving around and spamming?
why do some people lag out and some dont?

any tips will b appreciated