As it turned out, my problem is with HDR, Dolby Vision and the technique we could call pseudo-HDR. This latter is some software solution used in displays/games/etc to HDRify content, which then gives (for me) the well known glowing texts, highlights, or high contrasted objects. This technique is meant to bring the scene close to HDR on displays which are otherwise not HDR capable, or in software like games to look "better". Sadly that's all I know about it, not even a name referring to this stuff.
Last days I was thinking and wondering if there is any kind of solution to remove/dampen/whatnot this HDR effects, but I simply have no clue.
Just asking this, if maybe someone did something similar already, or at least would have an idea where to begin? Software or hardware wise? Maybe its not even possible?