Yes you are right about that but i think christiano ronaldo is an important person on real madrid, it's like he can to be a leader on real madrid and also can support their teammate on real madrid. Let's see what can Zidane do on the next matches without ronaldo, if he still can't figure it out, it will be a big problem.
football should be not an individual play but admitted or not sometimes there are the teams who too rely on the particular players such as Messi to Barcelona and Ronaldo to Real Madrid and if they're not played because got injury or suspension then the teams itself cannot playing well and usually they will lost and i think this is the cause for now why Real madrid still cannot showing the best performance yet because they still cannot figure out the players who equally to Ronaldo skill