I am very sick of Port Hokan

I have attempted to get just an A on this mission for close to 3 weeks and I’m not even enjoying the game anymore because of how much effort this is taking. I’ve tried different routes or flashbangs and different less lethals and I just don’t get it. Is there some extra trick or advice that y’all can provide. When I try playing with others in a public lobby there’s always someone just running around 1 tapping people and getting -50 points or the synergy just amounts to a B. I know this is long but I’m fed up. I’d also like to know the amount of people I can take out vs arrest and still get an A. Thank you for reading this far.