Your watch history includes these videos. Your spam reports are not part of the algo. Because you clicked on them and watch them long enough they become part of what you engage with.
If you have first-hand knowledge that this is true, then I should inform you that this behavior is a bug in your system.
There's no conceivable way someone would want to see more of something they've flagged. And if you can't tell that kind of video from a legitimate SpaceX video I watch on occasion, then that's another issue.