Trust?
Ok, thinking back over the teachers who I have trusted the characteristic that they've all had was honesty. Using buzzwords - like resilience and mastery - are a red flag. They make me look up sharply to find out what you are trying to hide. If you look me in the eye and get your message across in a normal way, then I'm on your side, even when I don't like your message.
e.g. the Y4 teacher sat me down in September and told me that DS2 was too far ahead. She knew he was ready for the next level but she knew she wouldn't be able to deliver it because she had too many children who were behind where they should be. My reaction was to understand her position and completely respect her professionalism.
On the other hand, some frank admissions aren't acceptable. The MFL teacher who said she'd received a list of children who had SEN but had never bothered to open it, didn't leave a great impression. Nor did the HoD who didn't know that Ds1 was quite able in his subject, even though he was their prize winner for highest attainment the previous year.
Distrust sets in, however, when the teacher offers scepticism when you ask about extension work or G&T. I can live with it for the first couple of weeks, but after that I am scornful that they haven't bothered to read the previous teachers reports or note their own test scores.
The other necessary component was that they knew my child. (In secondary that means not having to sneak a look at the desk plan to put a name to the child's face across the desk from you at parent's night. Actually knowing something about their ability in your subject is a bonus).
At primary, its a bit more. You want the teacher to maybe be able to say a whole sentence about your child that shows they "get" them.
That's what makes me trust my Dcs own teachers. However, trusting the teaching profession as a whole is harder. I think it comes down to your unions and how they mis-manage the media. Bow Crow of RMt used to routinely try to wind up the public. He needed them to be angry so that the govt would be pressured into doing whatever it took to get the tube running again. He didn't care how the public perceives his drivers because they were nice and safely distanced from the passengers.
Teachers cannot take that route. The teaching unions need to remember that they are representing a body professional, decent, honourable people and present you in that light. You don't make "demands", you make reasonable requests. You don't go on strike because you see the classroom as an inadequate work environment, you see the classroom as a place for children and you each struggle with your conscience when going on strike and only do so when you feel there are no other avenues open to you. (Then you ban anyone with orange, purple or green hair or with tattoos on display from standing under a NUT banner in a march).