One reason may be that you have a lot of common friends who like those things or you like pages or are part of groups which has a lot of people who like those t

One reason may be that you have a lot of common friends who like those things or you like pages or are part of groups which has a lot of people who like those things. Ad-targeting is not supposed to work 100% for each and every one. That would be counter-productive, because the algorithm will be too conservative and not explore enough potential targets. You can improve ad-targeting for yourself by providing feedback to the model through the menu that comes after "Hide ad".