disclaimer: THIS IS ONLY MY PERSONAL OPINION
in order for you to have a successful, you need to have your own image and identity, fresh concept, fresh member, something that can make ppl curious.
just like how blackpink,itzy and new jeans manage to hit it big on their debut, because their concept are fresh on that time (bp on 2016, itzy on 2019, nj on 2022). same thing can be said on gidle considering theyre coming from CUBE (CUBE is a nugu on 2018).
group live ive and lsfrm, they arent fresh and will forever be on izone's shadow, tho both group are doing better but that izone mark will always be there, thats why they are doing well but arent as big as nj.
and ofcourse another reason is you must come from big company
what do you think?