maybe you should ask yourself how many landings you have actually made in 1300 hours total time.
and if you are flying a jet for a good portion of that, I'll bet your hand flying time is actually pretty low. 900 hours on a jet, half goes to the captain, so that's 450 hours and with 5 hour legs maybe you have done 90 landings?
ask, check your log book, wonder.
and with 400 hours before that, maybe another 500 total landings?
so, my guess is you have less than 800 landings.
it takes time. it takes experience.
one thing is that ground effect seems to happen at half the wingspan above the runway and that is where the flare is about the right place.
take some advice from the other guys here, look far down the runway, read some good books about flying and be precise