OP you should understand that all platforms have different ways of doing things and the Layout from twitter and other social media platforms which you prefer must not be applicable to all platforms so you don’t have the right to condemn the ways of this forum. We are okay with it and we are already used to it so making changes will not change anything.
It’s even better this way because early replies are the most relevant and other replies are mostly spam. Also reading a post and early responses makes it easier to understand the topic better.
Such an algorithm already exists her, it's called "Show unread posts since last visit".
This feature makes things easy and instead of regularly going through the whole forum and boards to access new posts you will have all unread posts and threads from different boards lined up for you. I sometimes make use of this feature.
A quick and dirty way for a user to put this into action is to place all the topics they don't like on ignore, and all the boards they are not interested in reading on ignore as well (which will automatically ignore all topics in that board), and then that feed will be full of topics you actually want to read.
I have not come across this feature of placing a board on ignore, rather i simply place notifications on the topics and boards that interests me so i get notified of new posts on a particular board.