I consider an argument strong when the objector to the argument in order to avoid the conclusion which follows from its premises, is forced to admit that the universe brought itself into existence.
For an intelligent person to be reduced to holding such an irrational position in order to avoid the conclusion of a philosophical argument, I would call that a strong argument. You would not of course because you, at all costs, cannot accept the theistic implications of the conclusion of the argument, namely that the universe has a cause for its existence. So you dismiss the argument as weak, when atheistic professors, and scholars, astrophysicists and cosmologists do not even dare to hold such a position. Do you want me to believe you know more than they?
I am talking about the Kalam Cosmological argument by the way, which is one of many arguments.