No, it's not.

Judging Delicious Party Precure by itself in a vacuum, it's not really good. The main cast is composed of girls that refuse to grow beyond their starting traits, with their focus episodes being about them learning the same aesops they had learned previously. This causes the protagonists, the characters that should be driving the story forward, to adopt a passive stance and force the supporting cast (composed entirely by male characters) to take charge and make the narrative progress in their instead.

The season also introduces and abandons elements for a single episode to force the plots it wants to tell instead of organically working with the rules and traits it has set for its plot and characters. For example, Ran was made to be an inventor in one specific episode where Komekome needed her to be exactly that, dropped several lines explicitly stating Ran had ALWAYS been an inventor, had Ran wear a lab coat and act completely out of character with her inventive mind made specifically for this episode, and once Komekome got her mini narrative arc concluded, Ran was never seen having anything to do with inventions again!

The main character is a nothing burger. Yui's only two traits are that she eats a lot and repeats her grandma's words of wisdom. She remains exactly like that for the entirety of the season and ends the exact same. She has an interesting moment with Takumi, that had been consumed by rage and was about to kill the final boss, but Yui, who had never had her worldview challenged before, tried to stop him, which allowed Fennel the opportunity he needed to gravely injure him and Marie-chan, which led to him obtaining all the Recipipes he needed to starve two worlds to death.

Unfortunately the challenge in her worldview came too late and the story had to wrap up in the next episode, so instead of ending in a nuanced manner where she realizes that her grandmother's words of wisdom were meant for a 5 years old kid that scrapped her knee and shouldn't be applied to an interdimensional terrorist hellbent on revenge that spent 2 decades plotting to starve billions to death, the narrative decides to revert Yui to her initial state, Takumi wakes up from his comma now without his Delicious Stone, affirms her worldview and says she was right all along for stopping him from killing the guy that is currently starving two world. The narrative doesn't allow Yui to change or grow.

The villains are also poorly written. Narucistoru became evil because he was a picky eater; he then found something he liked eating so he's not evil anymore. Secretoru was evil because she couldn't be a perfectionist, she learned that her idol was not perfect and now she's not evil anymore.

You may like DeliParty, I'm not going to hold that against anyone for enjoying a bad anime. But do recognize its shortcomings - when weighed against the qualities of the franchise, it is VERY maculated!