Ironically you stated facts
Mihawk being in Shanks movie would've made Shanks look not so impressive
N now since it's proven
*Shanks had acoc when he used to duel with mihawk
*he was strong af
*and his fighting style remained the same
Imagine how strong Mihawk would've been back then to equally clash or even beat a low top tier and they continued grew stronger
One to be Yonko
And another to maintain his posi
The set-up for Mihawk hype is there but our actual problem is also Oda himself. His writing style especially post time skip doesn't help Mihawk's case.
Mihawk needs some feats that will free him from the Marineford writing shackles if you know what I mean.
Marienford was trash even in itself. No one feared Mihawk, in reality Vista should sweat even from the thought of clashing his swords with Mihawk.
Shanks stopped the war and no one wanted the smoke with him, no one was bothered about Mihawk's existence if we have to stay true to the source material, even if he is walking Top Top tier, his portrayal is so trash.