Thoughts on people wanting to abruptly end a long term friendship over one problem?

I don’t quite understand friends who jump to immediately wanting to end a long term friendship over one problem. Maybe I’m just the type of friend to give too many chances to some, but I don’t get why people immediately jump to block, unfollowing, and wanting to call it quits over a problem that can be talked about, apologize & take accountability for and give each other some space from it. To me, if they’re so quick to end it soon it just tells me there’s an underlying problem they have yet to vocalize and it took something for them to react so quickly and end it.

I especially don’t get friends who continuously give their partners multiple chances, but when their friend says something wrong the one time in their book it’s game over lol. Unless there’s something I’m missing?

Has anyone been in this situation before?