For me, it is probably from the fact that I am blunt and am willing to take on the "untouchable" topics. So, people get defensive around me. It is something that I have to keep working on as I learn more about myself. For example, the word "tradition" is an evil word for me. Tradition means you have not improved or updated whatever the topic is. Challenging and changing long-held beliefs is an opportunity for me but blasphemy for others. Combined with my bluntness, it does turn people off.
Suppose the topic is what to have for Thanksgiving dinner. I might notice that everyone in the group hates turkey and that everyone always complains about how dry the turkey always is. But if I broach the subject, by say, suggesting that we cook with a calibrated thermometer so that the meat isn't dry (Or even worse, suggest a main dish that the family likes to eat) that is instantly regarded as a sacrilege that I dare change the tradition. Turkey must be cooked, and it must be cooked the way it has always been cooked--no ifs, ands, or buts. I may prophecise that we'll have another miserable meal. But I am always considered wrong. Until, inevitably, we have yet another dry turkey that gets thrown out barely touched.
Mostly though, it shows itself in the form of being interrupted and shot down before I get to say what I think needs to be said. Here is a typical conversation:
Me: I think that we need to..
Them (interrupting): No, you are wrong.
Me (thinking to myself), How can I be wrong when I haven't even said the words yet?
Me: A recent study shows that...
Them (interrupting): No, that is incorrect.
Me: Last time we drove the car the brakes had a...
Them (interrupting): No, the car is red.
In frustration, I tend to either be quiet or sniper in my conclusion by skipping any lead up words. Instead of saying "Last time we drove the car the brakes had a problem that indicates they might fail", I have to blurt out "Brakes broken" before I can be interrupted. That is my only shot at getting my point across.
At work, despite being the person that everyone needs to come to to fix problems, I have been asked not to collaborate (why do we pay others), not to be authoritative (it scares others), and not to passive aggressively fix problems in the background (no one likes that). So, I sit back passively, trying to get some warnings in as best I can, and wait for the disaster to happen so they can come to me to fix it.
I basically live my life like this story of Bob Ebeling:
https://www.npr.org/sections/thetwo...ster-challenger-engineer-still-blames-himself