Hot take: Gold V is easier than Gold IV arena.
Every once in a while arena reset drops my down to golf IV, which starts you at 2900 trophies. gold V is 3200.
The grind from 2900-3200 is tricky, with a lot of decent defenses from people pushing for gold V and only the rare 1-man.
https://mobdro.bio/
On the other hand a reset to Gold V, at 3200 trophies, usually find me in the 3400 range after just 1-2 days. A ton of 1-mans. A ton of bland speed freak teams that are easy to counter. Basically players with great offense teams that wont fall out if gold V so dont care about defense.
I keep myself above 3300 trophies for reset so IDK why i drop to gold IV on occasion (like 1/3 weeks) but its really a pain when it happens.