I can tell you, it doesn't get better. In your late 20's any friends you had fade away, your social circle shrinks dramatically and your chances to make new friends dries up significantly. By that point people have already made strong social bonds with people they've known since uni/childhood and don't want to change. You have to be spectacularly interesting and unique for people to want to get to know you and add you to their already existing social circles. If you are a loser incel already with few or no friends, then it's OVER. Nobody wants to be friends with some person in their late 20s who has no friends or social history. You can no longer talk to young early 20-something year olds without them thinking that you are 'other', there is a chasm you can no longer cross (obviously excluding total chads).
The best you can hope for is what happened to me, the ER rage, self-hatred and anger subsides and you just became emotionally numb and dissociated from the rest of humanity. You no longer feel rage, but you no longer feel joy or hopeful. You become dead inside. Sorry breh it's over.