Rank Skill Gap APAC

My peak is plat 3 and but my game sense is much better as i think. problem is i cannot go far because my reaction time and mechanics. when i get higher rank players they shoot before me. sometimes i only saw enemy and no time to react(even kill me by body shotting before i react). when i play in plat i loss 1v1 face to face most of the time. also my headshot percentage is high than 40% most of the time.
The teammates i found in my lobby is mostly don't have good game sense and also not even watch map. but kill enemies easily even body shooting.

what i can do to improve. please help

More often than not, if you feel like you don't have time to react it means your peeking or holding technique isn't ideal, it's a sign that you deserve your assigned rank.
Your teammates may be bad at certain things, but they are the same rank as you, which means they must exceed at other things which you may not notice. It's much easier to notice and point out the flaws of others.

I'd recommend watching back your own VOD and being super critical of all of your mistakes, ask yourself what could you have done better. Even if you think it's 100% your teammates fault, try and still find something that you yourself could do better. I can't really say much more about your gameplay without a VOD