Your strings need to be programmed to sound more real and expressive. Attach notes in each melodic line, make them sing. You need different bowing styles (vibrato, slow sustain, legato, lyrical, expressive etc) to achieve that. Move the start of the note earlier if the note is to slow to attack. Use MIDI controller 1,7,11 etc for the final touch. LIsten to live orchestra to develop your sensitvity and ear for this. I don’t know if it’s the case in your track but avoid sample repetition.
The mix need to be cleaner. You get to much harch frequencies (2000-4000 hz) and not enough treble. For that kind of big epic track your contrabasses may be more present. I personnally start by cleaning my instruments with very narrow notches to attenuate too loud harmonics and after that, I choose where instruments will have their place in the frequency spectrum.
I hope it helps!