I think your weight loss so far is great! That's over a pound a week, they only aim for something like one and a half pounds. You're not massively obese either looking at your stats so you shouldnt really be expecting huge weight losses. I think you're pushing yourself too hard personally.
Endometriosis can have effects on weight too, yes.
I did go to WW for a while on the Pro Points plan but I felt lost, there was absolutely no guidance. You could semi-stuff yourself on chocolate and eat nothing else all day if you wanted and stick within your points and still feel starved. I dont think thats a healthy weight loss plan It didnt work for me and even while I was attending I started following the SW plan again. At least that gurantees me I eat some healthy stuff every day - protein, calcium, fibre. And then I can top up on yummy stuff if I want. I left WW and came back to SW after about 6 weeks.
And other people are right about the portion guidance, WW can't fix that, only we can do it ourselves. I have serious trouble eating pasta and potatoes so I limit myself now. Basically I just dont touch pasta at all now as I can eat tons of it and I cant eat it without pesto, so I've totally banished it from the house. Potatoes I limit myself to once a week, if that, as I cant control myself, (eg I have to have half, two thirds of a plate if Im ding SW chips). I can't stop myself so I plan ahead and make sure I have no more than one meal that week that has potatoes in it.
We're all different but personally I dont really think WW offers anything that SW doesnt.