@Yannick_Rottier Totally understand where you’re coming from.
Is this concern related to the existing issue of screenshot upload preferences being ignored? If so, we’re definitely working on this and will have a fix out in an upcoming game release that will work for both photo and video screenshots.
The end result is that if you have it set to “Always”, your screenshots will be selected to upload by default, “Only my shots” will only include screenshots you’ve taken manually and no automatic screenshots / notable moments will be included, and “Never” will result in no screenshots being selected for upload.
It sounds like that would make it so you don’t have to manually delete anything from Strava - but let me know if you have any additional concerns.