I don't complain. I just want it to be gentle.
Try to give medication to a cat.
I have. I pry open the mouth on each side with the thumb and forefinger of one hand and when it's open a little, I throw it in, then close the mouth and rub the throat.Arguably one of the worst parts of cat ownership (behind cleaning up random spraying and perhaps all the scratches... which are worse for me, because I'm allergic and they itch horribly for a few hours).
If your comment is too long, break it into multiple comments and post them all.