Solo q or means team q

Hi. If in ranked its called solo q why in all seasons he got premades? Solo q is sollo raNked not premade ranked. Riot should cut option to invit friends in solo q, no fair play vs. 2 premadez or more when my team no one premade i main supp hard up in ranked , im bad in other lanes . But if ranked solo q is solo stop make option to invit people ,peAce