Arctic package black tank valve not shutting

Well after working on it for an hour today I found what I believe to be a few problems. The rod part of the cable I believe is bent causing binding as it passes through the initial part where the handle is. I did. manage to get the valve to close once and afterwards it is not closing again and is super hard to actuate. I tried putting some dry lube into the thing but it did not help. I was able to lower some of the plastic but the propane line runs below it. I see the bottom of the valve and it has a bunch of spray foam holing things in place so I just need to remove that and then I believe I can get to the valve enough to remove it.