A lot of crashing

Whenever I am trying to play a minigame with my friends that involves throwing snowballs, I crash, I think this is because there are too many entities being spawned at the same time, but this is getting very annoying for me because I crashed for the 8th time in just 4 hours. This also happens to me whenever a lot of entities are in the same place and being generated at the same time, but this is just extremely annoying.