Although various iterations of Hulk exist, the common denominator is that increased anger = increased strength.
During Age of Ultron, Iron Man attempts to reason with the beast whilst it is rampaging through Johannesburg. During these futile negotiations, he mentions Banner before quickly changing direction, realising he has angered Hulk (which isn't going to do him any favours):
Tony Stark: [in the Hulkbuster] Listen to me, that little witch is
messing with your mind. You're stronger than her, you're smarter than
her. You're Bruce Banner!
[Hulk roars and throws a car at Stark]
Tony Stark: Right, don't mention puny Banner...
We can infer from this that the MCU is tacitly acknowledging this as source of Hulk's strength through this reference to the comics, which means the very mention of Banner is enough to incite anger in Hulk, in any state of mind.
Without needing to go deeper, or anywhere near theoretical arguments, this is enough to assert that Hulk feels little other than animalistic contempt and resentment to Banner.
To those who interpreted Hulks last action self-solitude as something noble, I'd challenge you to the realisation that it was Hulk, not Banner that switches off the channel to Black Widow. He doesn't want to be Lullabye'd, because that introduces banner into the equation and allows him the right of response.
Hulk is doing nothing more than suppress the control of Banner, out of what he perceives to be Self-preservation. There is no guarantee that Banner will agree with the Hulk's decision, as (evidenced earlier in the film) he will have no recollection of the events as they transpired.