Maybe something productive can come from this...
I don't encounter any of those issues IRL, I only see rainbows everywhere and people saying "be inclusive".
That doesn't really mean anything to me because I was never excluding people to begin with, so nothing is achieved.
For people who were against you to begin with, seeing rainbows isn't going to achieve anything there either.
There must be a better way to go about it - so that people understand why you're campaigning and feel some sympathy for that.
A bit of a side note - most people understand a flag as representing a country, and the use of the flag represents marking your territory, and has strong military association. It's not unreasonable to interpret the Pride flag as an attempt to dominate a space, which is going to immediately put people on the defensive, so it might be counter-productive to use a flag. When people see the colours used, even if it's not on a flag, they still interpret that as a flag.