If you don’t want to continue then just resign, I’m sure someone will jump into your position.
However, if they are planning and passing things at meetings that aren’t in the original set up conditions when the Charity was first set up, then challenge them.
You should all have copies of the original aims, as do the Charity Commission and if they stray from what the Charity was set up to do then someone has a duty to challenge them and put them back on the correct path.
I was on my village trust and they were a nightmare so I resigned at a meeting and it was all fine, I said that I would stay until they found a replacement as they needed at least a quorum, it didn’t take long for them to replace me.?
NHS U turn on trans terminology