is it true that aespa only dominated cause there are no GGs from JYP, YG and HYBE debuting the SAME YEAR as them?

I would say they totally won over itzy even if they are like 1.5 years apart...

Nah, those companies debuting groups at the same time wouldn't have changed much. Aespa's releases were alongside BTS and IU on all occasions. That's more competition than anything debut groups from those other companies could bring.