What am I missing please help me

In yt lives for both quant and res I solve every question without a problem and also any question from any source i practice I solve it without an issue so my concept and clarity is fine right?

Now the problem is consistency for prelims both po and clerk I get 90+%ile without an issue problem starts in mains in one mock i get skyhigh 95+%ile in another mock i fell too deep like 60%ile why does this happen? I am being very very inconsistent I am too weak in GA so I need to maximize my res and quant in sectional tests too I am very very inconsistent what am I missing? I am solving literally any hard questions in lectures in yt but why my mock tests are so inconsistent?? How to improve this?