No it was made clear by the show runners and the posts were there explaining that to you, and you read them, you just ignored them. basically just read my posts in this thread, then read your replies denying them. Arianne, Aegon, Victarion, Euron*, Quentyn all joined strong belwas, cold hands, and lady stoneheart in the "doesn't matter, not actually important" bin of not making it into the TV show because they are ultimately, fluff characters that aren't important to how the story ends. If the roles they had to play in certain scenes were important enough then they were shot with other characters filling in the gaps (ie Cold Hands was replaced by a flock of ravens, and then Jon Snow and company, Daario replaced Belwas as champion, etc)
*there's still a certain segment of the fanbase who believes daario=euron so i'll leave that there.