Most zerg struggle against protoss because of 2 things.
1. Poor Scouting
Overlord saccing is very important. Especially if your opponent forge FE as he most likely wouldnt able to stop your overlord from scouting his techpaths. Against 3 gate sentry expand u also have to try to overlord sac but you can sac 1 at 7 min another one at 11 min when u have overlord speed
2. Poor Reaction
Scout stargate? Start making queens and spores. Scout 6 gateways? Start make lings/roaches /spines. Scout 6 gateways AND a twilight council? Throw infestation pit and tons of spines and a spore of course. Scout robo? Throw a spire! Zerg IMBA
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