Lucky clover is a fun card, and an uncommon, so that's an easy craft to dick around with if you're looking for a fundeck. Still, you'd need the rares - bonecrusher giant, murderous rider, lovestruck beast to get any real use out of that, but from what I've played with it, it pays back the investment pretty quickly.
My red Calamity deck gets owned because of the little creatures and it doesn't really have any punch without calamity. You either draw Calamity early and it needs to survive too, or you lose. But even like that I usually win 3 games on average in constructed. I think I won 6 games one time.
This would be the limitation of the cavalcade decks. They're good in that they can consistently threaten a turn 4 kill, but the moment people start interacting with you cavalcade (or you simply don't draw it), it turns out you're really playing a bunch of inefficient creatures (Chandra's Spitfire, Torch Courier and Simpering Scorcher all spring into mind). I prefer the more traditional RDW build with Torbran, Rimjob Knights, Steam-Kuns etc., but the results aren't spectacular here either. Enjoy the wins you're getting, 3 wins in standard event is solid to build a playable pool of uncommons, but be prepared to let it go, and just start building towards something else.
How do Esper Control decks beat the Field of the Dead decks?
I would say, it doesn't. Esper pretty much went out of standard when Scapeshift became a thing until other decks (Kethis Kombinating Kontrapton) pushed the Scapeshift and UG Flash out of the meta).
Long answer, you get a few opportunities to cripple it, remove the offending field with Unmoored Ego, shut off the land fetching with Ashiok, Dream Render, and those two should really slow it down. Shut off the remaining card draw with Narset and control the general population with wraths,
finally groom a big Lilianna (with or without the help of the elderspell) and utlimate to eat their entire field. That's the theory, in practice, you'd need a lot of stuff to come together. Fae of Wishes can help you get the pieces, but it won't be fast.
In comparison, Fires of Invention UBR gets access to better answers (Casualties of War from sideboard) and gets to the good part faster, so if you want to play control, there's that. WUR control obviously flies over the whole shebang with Sarkan Planeswanking Squadron, preferably lifelinked after Clarioning a whole bunch of zombies.