been having a problem with my buggy

[Hyper-5]

hey, l've been having this particular problem with my buggy for a long time, the problem is, when l give it full throttle ther is a delay the the car kicks in, BUT when l try 2 turn the car or brake when it's in full throttle the car wont turn or break for a number of seconds, there is a delay in the when giving it a hit. if l go easying on the throttle it's fine. ldk if its not enough power going through the esc or my burst rate is low on my batter (20c). Can anyone help me out here?