Some people like to pretend that they know things (they don’t, at the most they googled it lol) and then go on and on “teaching” it to others who neither asked for it or want to hear it or find any validity in that pretend “knowledge”.

Well they do it with “people pleasers” who might lack assertiveness. I wonder if you come across as extremely agreeable to the point of being a bit passive so these people use you to make themselves feel better. They’d not try it on people who’d shut them up quick

So I am convinced you’d need some assertiveness training. There is such thing is being TOO nice