Honda odyssey is having combustion issues
 

I have been working on this thing all summer, trying to replace its camshaft sensors, which led me all the way through to its timing belt. I have gone back multiple times to put the timing back right, I have replaced its old gas (6 ish years old) and have replaced the spark plugs, but it can't idle. Here are some images of the gears, do I need to go back because it's somehow slightly off tdc?
https://cimg8.ibsrv.net/gimg/hondafo...db9954f858.jpg
This was taken at a wonky angle, but maybe that is slightly off?
https://cimg1.ibsrv.net/gimg/hondafo...f643fcb76c.jpg
Bottom of the three
https://cimg5.ibsrv.net/gimg/hondafo...289365f000.jpg
The one to the right

Shouldn't have slack in the belt. Tensioner?