First off, let's discuss Resurrection 'F'. There's the infamous scene of Vegeta seemingly being almost tempted by Freeza's offer of making him Supreme Commander of the Freeza Force, or whatever the title was. While Vegeta quickly makes it clear that he fully intends to turn Freeza into mincemeat, that moment of hesitation and him ominously approaching Goku, combined with the prior scene of him suddenly attacking Goku mid-fight, would almost give a less-initiated audience some pause. He also justifies his relationship to Goku rather cruelly, saying that he only keeps the moron around because he needs him to get stronger, and later claims that he'd rather die than team up with Goku again. Yeah yeah, Vegeta's a yandere, but still... Harsh.
Then he dispatches Freeza swiftly, with no wasted movement or unnecessary showboating. He just goes straight for the kill.
This contrasts with the anime adaptation, which sees Vegeta refuse to court Freeza's ridiculous job offer and play around with Freeza in a slightly more Goku-esque fashion. The one counter to this would probably be him instantly killing Ginyu with a sadistic smile, but considering Ginyu's annoying signature ability (plus the fact that, ya know, he's not s'posed to be in this story), it was a strategically justified move.
Next, we move to Super: Broly. Vegeta comes off as a real asshole in this movie, though he does spit facts occasionally. We're first introduced to him angrily chewing out Goku for being dumb enough to trust Freeza, with the events of the Tournament of Power having evidently done nothing to improve Vegeta's opinion of Freeza in the slightest. Vegeta starts borderline frothing at the mouth by the end of his rant, enough that Goku gets offended by it for once.
That's the tip of the iceberg. Well, there is a lot of ice in this movie. When confronted by the existence of yet more Saiyans that survived the genocide, how does the proud Prince of All Saiyans react? With curiosity? Gratitude? Disbelief? Nope. He once again reiterates that he doesn't care about the fate of the Saiyans and wants nothing to do with them. Oh, those guys are Saiyans? Yeah, whatever, we've already met Tarble.
While he finds some enjoyment in his fight with Broly, as soon as Broly starts offering significant resistance, Vegeta goes Super Saiyan God and uses excessive force seemingly with the intent to kill, which Goku loudly objects to. Vegeta's instinct to finish Broly off was ultimately a wise move, since the barbarian's ridiculously huge growth over the course of a ten minute melee represented a dangerous threat, but Vegeta could've gone straight to Blue and killed Broly quickly and painlessly if that were the case. Contrast this with Goku's perceptive, compassionate approach which nearly ends the fight. Vegeta's killer instinct seems to transfer to Gogeta, who also shows a barbaric side with no mercy or empathy.
Gogeta naturally leads us to the Fusion Dance practice scene, which many fans take issue with as it presents Vegeta as babyishly resistant to the idea of fusing, mainly because he finds the poses ridiculous, the same justification he gave against doing it way back in the Buu arc. Still one of the funniest scenes in the movie, but I can see where they're coming from. At this point in the Super sub-franchise, Vegeta has shown willingness to fuse when needed (with some resistance, and so long as it doesn't involve the stupid poses) and generally humiliate himself (the Bingo Dance) for the greater good. GT famously saw Vegeta suggest the idea of Fusion to Goku, showing his character growth. Vegeta was also willing to fuse to beat Janemba. Neither story may be "canon" to the current series, but they showed audiences Vegeta's mature side as Super frequently does, so seeing him moan about Fusion now of all times understandably comes off as an annoying regression to some.
All this leads me to believe that Toriyama has a very specific conception of Vegeta's character when writing him. Whereas other writers like showing Vegeta's growth and compassion, Toriyama seems to like emphasising Vegeta's residual mercilessness and selfishness from his Badman days. Toriyama's Vegeta may be a better guy than he was, but he'll still murk your arse without a second's hesitation, and he's less willing to drag fights out than Goku if they can be ended quickly. As has been explained in interviews, Toriyama was always ambivalent to the idea of Goku and Vegeta fusing again after the Buu arc, as he believes their clashing personalities wouldn't allow for it. It was only thanks to some pressure from Toyotaro that he relented in bringing back Vegetto, and seemingly again with Gogeta (that time from his editors). Like it or lump it, Fusion is one of the biggest draws of the franchise and as the saying goes: money talks, bullshit walks.
Even Toyotaro, Toriyama's closest collaborator in the Super project, seems to give Vegeta more of a tepid, compassionate personality, which is more evident in his personal arc throughout the war against Moro, though we can still only speculate how much each of them contributes to the writing. With rumours that the currently ongoing Granola arc has had more story involvement from Toriyama than the last, it seems we're starting to see a more ruthless Vegeta resurface as he fully embraces the path of the Hakaishin. Will the trend continue with the upcoming movie, which is supposedly Toriyama's most personal project yet?...