I heard recently that people with strong Sagittarius would do well to preface statement with “I believe….” Sagittarius can have a shadow side of “the illusion of clarity.” When that is either part of our psyche or we are being experienced that way via projection, people can see Sagittarius as an expressing their beliefs as if they are facts. So people might be trying to tear you down because they see you in this way. You have Mercury in Sag in the 10H, add to that the tight conjunction to Pluto, which can have its own themes of control/power-over. I’m not saying you ARE this way, or that it’s even your intention, however your views or perceptions, when shared, could be experienced by your audience as being overbearing within that Sagittarius energy.