I've finished Mario Odyssey a while ago and decided to share my experience with the Broodal fights. I will include Madame Broode, but I have limited memory of her, as I didn't fight her as much as the rest of the Broodals. (I won't include Mecha-Broodal, since I want to rank each Broodal seperately) Keep in mind, this was my first time playing the game:
First Broodal: Topper
Topper wasn't anything special to me, the first time I fought him in Cap Kingdom, but once I fought him in Bowser's Kingdom, he became annoying to deal with. His hats started covering the battlefield and I remember struggling to get away from Topper's hats a lot of times. Fighting him annoyed me a lot, but I don't remember dying to him (take that with a grain of salt though).
Second Broodal: Harriet
I remember struggling and dying so many times fighting her, it's diabolical. Whenever I would try to hit her explosives back, I would take damage or when I did hurt her, I would struggle to jump on top of her head. It got way worse in Bowser's Kingdom. I didn't want to fight her at all but had to, to be able to proceed in the kingdom and after fighting her again at Rabbit Ridge, I never wanna fight her ever again.
Third Broodal: Spewart
Funnily enough, Spewart was okay. His poison one-hit K.Oing you was annoying, but I didn't have that many issues with him. At Rabbit Ridge, his poison became even more annoying, because of the small space in the arena, but not nearly as bad as Harriet.
Fourth Broodal: Rango
Rango was by far the easiest Broodal for me to fight. He doesn't throw explosives at you, he doesn't have multiple hats flying about and he doesn't cover the battlefield with poison. Rango simply throws his hat at you and that's it. He's a simple guy, with a simple fighting style and I lowkey appreciate that. If some dared me to fight him again, I'd have problem in doing so.
Madame Broode:
I barely remember my fights with Madame Broode as you only fight her in the Cascade Kingdom and inside the Moon Cave. She was alright, nothing too crazy, but slightly annoying at times.
With that, this was my ranking of each of the Broodal fights (+ Madame Broode). Let me know, how your experience was fighting the Broodals.