Not even close.
The design is dated and everything else is wrong.
You need to spend far more time studying basic design principals, color theory, hierarchy, typography etc…
You are not ready to be submitting themes yet.
Then how I can fix my designs better?
No, it’s terrible.
Like I said, you need to forget about submitting themes for now and spend much more time learning and honing your skills.
Nothing you do to this will get it accepted, it is a million miles away from the current standard.