Sorry have to do it in two posts, too long in one.
Not always, or do you really consider their actions in CONDEMNED (a lot of innocent people got culled and criminals escaped), OUTCAST OR MC as the best they could do?
Well, the way Shen and Strom were portrayed you could also just see it as ignorance and that it was not really true what they said. Now we could argue but I just say it was simple luck that TPTB provided. 2x two hive ships conveniently explode, never any consequences when they get caught, their hive ship was heavily damaged in SoW but they still can outrun the other ship and destroy the cloning facility, Ronon with his superhero act in TLT ..., I could go on and on.
And sadly you did a bit the same with your second part when Atlantis launches the PJ to attack vulnerable parts of the hive ships. The Wraith have fought the Ancients for over 100 years, I'm sure they have developed some counteractions against cloaked PJ. And even if not, they KNOW Atlantis has cloaked PJ, they could simple have a swarm of protective Darts around their sensitive systems. Please, don't make the Wraith as dumb as TPTB made them. I hope, you give them a chance to show
their ingenuity. I had hoped a bit you would let the Wraith make use of the Hoffan drug research Todd acquired or the PJ they got in CONDEMNED or at least put that experiment of PHANTOMS into good use because obviously the device worked well.
Yes, I can imagine that is some hard work to clean up the mess of TPTB.

Well, you could evolve them into the treated enemies they should have been as they were beings that rivaled the powers of the Ancients and they had never before encountered a race which had this ability.
I'm sorry but why do you consider getting those ZPMs a betrayal? There was never an agreement about those ZPMs. They agreed to defeat the replicators together and that's what happened. What would have really been betrayal, if they had some other hive ships in store, which did not participate in the battle, and went with them to the meeting point and attacked the humans but they DID NOT DO THAT. It's not Todd's fault if Atlantis never thought of the opportunity to acquire some ZPM's. I'm pretty sure you wouldn't consider Atlantis taking some ZPM's and eventually use them against the Wraith as betrayal, would you? No I think the viewers would congratulated them for this brilliant move. It was a temporary alliance they both knew that and you would be naive to think this alliance would hold because as Todd agreed with Sam, in the end they will be enemies again. Both sides knew and accepted that fact.
As I pointed out before, those benefits were marginal to say the least.
It's probably about 90% luck and 10% achievement the way TPTB wrote the plot. And the funny thing is, the Wraith never have luck. Just look at Todd, he gets betrayed three times by one of his underlings (MW, SoW, EATG), that's quite some bad luck and oh, in SoW and EATG it helped Atlantis a lot, funny isn't it.
He didn't tell her that they would kill the queen but he probably knew that the primary would never accept the plan. And he didn't tell Atlantis because they would probably think it's too dangerous and maybe didn't believe him because they don't know anything of Wraith society (sadly never really explored). His plan was very risky for himself because if it failed his life would be at stake like Teyla's, that is not really betrayal. And he wouldn't be the head of the alliance but Teyla and Teyla uses this fact to threaten him later. And look what Teyla did, she betrays him a lot more by killing all those Wraith which are her subjects. Pretty stupid move considering they want an alliance with the Wraith, not very convincing if you kill them right in front of Todd. Probably that is why Todd was very reluctant afterward to agree to the retrovirus.
No, he couldn't have come up with it because his original plan was to deploy the virus against the replicators but thanks to Atlantis some part was missing and that's probably why it didn't work. And it wasn't his plan to attack the planet of the replicators and use the hive ships to assist them that was Sheppard. So he really helped them and had no hidden agenda. After he knew the plan he saw the opportunity to act but it's not his fault if Atlantis didn't think of it and it would certainly be dumb to tell them "Oh guys, BTW did you think about taking some ZPMs?". And he pointed out in SoW that he wanted to use the cloning facility to wipe out the other Wraiths. Of course he could have lied but I got the impression he was sincere when he said that.
Excuse me but the reason why he was starving was Atlantis. I think it's only fair in his point of view to provide him with food because Atlantis KNEW EXACTLY what they got themselves into when they took Todd prisoner. That move still doesn't make any sense to me. They just could have taken him to another planet through the gate, question him and then release or kill him without risking to reveal the location of Atlantis or maneuvering themselves into the dilemma of how to feed a Wraith.
According to INSTINCT "It feeds three, four times a year, takes two or three people each time." Sorry, but I'm not going to buy that he simply hold out 9 months without feeding. Hope, you have a better explanation.
Well, same with Atlantis. Didn't they twice suggest to betray him after they had an agreement in THE SEER, oh yes they did!
Completely agree with you.