>>91130165She did break an all-time Twitch record this year (multiple if you include being the first female streamer to be #1 in subs on the platform)
She streams very long hours, she puts out regular music videos and MMDs, she hosts tournaments and contests, she debuts new 5-figure models every other month, and almost more importantly, she collabs and joins events with other big streamers and content creators all the time, which gives her a lot of visibility
Doki had a big year numbers-wise and drama-wise, and she does put a lot of effort behind the scenes too, but it would have been weird for Ironmouse to not win this one