Hii buddy.
So it’s not a problem getting low in physics. Many students do suffer with this subject. The thing is you can easily improve it just by working smartly.
If are studying physics for 4 hours daily that is good.
Just you have to utise this time wisely.
I reccomend you to join PW for improving greatly in physics. Physics wallah teachers will teach you in the simplest way you understand and they teach you to the point things which will help you score good in NEET exam.