The thing is the title of WSS nullifies all the points in Shanks' favor and I mean canonically.
There are also the speeches where Mihawk stats Shanks would fail to be a match to him on top of it.
These few elements are too important to dismiss Mihawk > Shanks despite Shanks showed something better in peculiar aspects.
imo no, not really. Title is proven by portrayals/feats. And even then, titles are not absolute. WSM is not forever. WSC has PTSD. WSS is no different. And its weird to have more significant feat (effortlessly cold-sweating the strongest marine is imo superior than cutting a huge object) and be called a weaker fighter,
..except if a weaker swordsman doesn't mean a weaker overall fighter.
Matter of perspective. If WSS title > anyone holding a sword, WB and Kaidou will snatch a sword and suddenly get weaker than Mihawk. So it doesn't work. After all, Bisento is classified as a long-hilted sword by some classification, so WB should be WSM and WSS if we want to go there. But apparently the term swordman is much narrower than some want it to, just like the term WSC is less legit than i want it to.
You can always be a weaker swordman to someone, and stronger overall. Depending on what other abilities you possess. Being a weaker swordman than someone in real life? You can beat that real life WSS using a gun. Same as WSS in OP, someone can beat WSS Mihawk if he has stronger "gun".
And also, the most powerful pirate (Yonkou title) > Mihawk, a pirate. So the WSS > any swordman vs Yonkou > any pirate works both ways. Yonkou title alone counters WSS, and having WSC-WSM as your equal boost it even more to the point of surpassing it.