i wish to have a "dislike" button for a post in addition to the reactions button we have already now.
lately, i feel i need such a button much more than the like button
Neither one of those are available in the "Like"-function in the forum software. To use them we need to actually post a message, which tends to make forum threads that are long as an elephant's trunk, filled with "Me too!!!!11!!!" and the like. The beauty of the "Like"-function, and the reactions therein, is that they don't contaminate the thread with low-content posts.
Every developer learns early on the road .... you will find people that is not like you... But you have to like them.... Why to get down because of that? No thank you.. be happy and spread light to absolutely everybody , no need of dislike button...
If you want to locally see how a page with dislikes would be, can edit the css . Thumbs-down is included in sprite_sheet_emojione.png and can be visualized by changing the offset to -96 for a given reaction emoji.
(Personally, I prefer ignoring than negative reactions )
I think angry conveys a close enough representation of dislike
If you dislike a post enough that you want to mark it with dislike, at least an angry emoji lets the poster know they may need to speak with you get a better understanding what your problem is with the post.
This is a forum so if it doesn't warrant further discussion, then why bother putting anything at all?