Last years success was not a reflection on Blake, I don't think anyone ever gave him credit for it. Some attributed it to Stevens, most actually said it was due to Sutter no longer being a coach. Which reminds of another reason DL was let go, he again showed his shortsightedness and instead of moving on from Sutter he gave him an extension.
Your expectations are out of control, in fact I don't know what you want other than Blake being fired. I get it, I booed him too, I didn't think the team was going to retire his banner, but look at this situation objectively, you are falling over yourself trying to find ways to hate him. This is his team and it will take a while for him to unpack and rebuild it, you thinking that he should have more than 1 impact player brought in going into his second season shows how unrealistic you are being(also, Kovalchuk has most definitely been an impact player).
He has the power to make changes and he has been, in fact I have been impressed with his swift actions, he doesn't dwell on a situation and doesn't fall pray to sunk cost. As for your point regarding him doing the same thing Lombardi was doing, except not trading away valuable future pieces, that is kind of an oxymoron. Not trading 1sts and high end prospects for rentals is very different from what Lombardi was doing. The fact that your main complaints seem to be a rumored trade that never happened and a 4th round draft pick being traded, I would say that Blake has done just fine thus far.