If you want solo Queue back...
Make sure to not buy any RP until it returns or something worthwhile takes it empty throne.
It might be a fight to be lost but the only power we solo players truly have is to try and bottle neck some of the income from the game. Yes this means passing on getting the new fancy skin when it first comes out but skins these days always return at some point to the store.
Riot is still owned by Tencent and money is the name of the game. If income drops that is a problem and they will have to change something.