Whatever that can create such complex universe is bound to be even more too complex to be able to come to being on its own without needing to be created at all at any point as well.

It is often claimed that since the entire universe along with everything in it are too complex to come to existence on its own or without having been created by anyone or anything external to them that is totally separate and distinct from them and not part of any of them. This still doesn’t make it less likely to have been created by multiple entities or Gods. If something is harder to achieve, it is supposed to be rendered easier to an extent by making many entities work on it, instead of just one entity. At least in most cases. Sometimes, things become easier or better when you do them all on your own only without any external assistance or help from anybody else whatsoever. But at least this is not a case where you say this definitely was created by one God only, and cannot have been created by multiple Gods at all, no matter what.  The argument that coincidence can’t result in all this universe and all that is in the universe is countered by that the creation of the entire universe and everything in that universe the way it is, is also less likely to be done by one entity, which makes the idea that the universe and what’s in it were created by multiple entities or Gods much more likely, assuming of course, that any of the above had to be created and cannot come to existence any other way. In addition, if the universe is too difficult or complex to come to being on its own, it would still be too difficult for any single entity there is to be able to create the entire universe with everything there is that is inside this universe alone all on its own. It is way less likely that the universe with everything that’s in it were created from nothing by a single entity than any other explanation that could be proposed for the phenomena. Certainty about the assumption that it was all created from nothing by a single God only indicates that you don’t care about the truth and that you are just a part of a cult that wants to control every aspect of your and everybody else’s thinking and behavior, without having to think about anything at all ever. It is easier to believe that the entire universe and all that the entire universe contains originated on their own, came to be on their own, or were always there without having a beginning at some point than it is to assume that there’s no acceptable explanation in this scenario except attempting to believe that the entire universe and all that the entire universe contains must have been created by one entity, whether this one or single creator of the universe entity is a God, as described in any theistic religion, or anything else whatsoever. Whatever that created the too complex to come to existence on its own universe and everything there is that’s in it is bound to be even more too complex to come to existence on its own without having to be created at some point prior to its existence as well. In this case, the perpetual question remains: Who created God? 

Belief in a God to be the ultimate explanation of existence of anything and everything does not solve the problem of how things came to be. It just increases the number of things that cannot be explained whilst explaining nothing of what didn’t have an explanation before proposing such solution.