Hi @Victor1e ,
Hope you are doing well!
This is an expected outcome because even though the form is submitted by some other user, in SharePoint the item is created on your behalf so it will take your name as created by.
As a workaround, you can create another custom column in SharePoint named as "FormSubmittedBy". The datatype of this column could be Person or group.
And while linking the form to SharePoint, rather than using "Created By" column, you can link the "Responders Email" to newly created column "FormSubmittedBy".
Then later on rather than filtering to "Created By" column you can filter based on "FormSubmittedBy"
I hope this helps.
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Thanks,
ANB