import requests

def findbums():
    league = "Havoc+Challenge+League+(PL4362)"
    realm = "pc"
    id = "1556123991345"
    url = "https://www.pathofexile.com/api/ladders"
    offset = 0
    limit = 200
    accounts = {}

    for i in range(0, 43):
        r = requests.get("{0}?offset={1}&limit={2}&id={3}&type=league&realm={4}&_={5}"
                         .format(url, offset, limit, league, realm, id))
        offset += limit
        json = r.json()

        for j in range(0, limit):
            entry = json["entries"][j]
            name = entry["account"]["name"]
            alive = entry["dead"]
            level = entry["character"]["level"]

            if name in accounts:
                if alive:
                    accounts[name]["alive"].append(level)
                else:
                    accounts[name]["dead"].append(level)
            else:
                accounts[name] = {
                    "alive": [level] if alive else [],
                    "dead": [] if alive else [level]
                }

    bums = []

    for account, data in accounts.items():
        if len(data["alive"]) == 0 and max(data["dead"]) < 30:
            bums.append(account)

    print(bums)
    print(len(bums))



if __name__ == '__main__':
    findbums()


Result:

['arcolas', 'LoA89', 'dooshbagginss', 'PathOfReeep', 'FlyingZamboni', 'Bumbuys', 'Headpipe', 'steve2355', 'Flowing', 'Darkisss', 'OrangeGu', 'Seraaz', 'quasicat', 'guingo1', 'improvizatoric', 'Auditorium', 'KennyWuLee', 'AreYouLOX', 'MaddyDaddy', 'Evandrinde', 'dstfgh', 'LittleSallybow', 'SisterHell', 'ywt978', 'poolie147', 'decro024', 'Riznell123', 'gleb94gleb', 'Raydient', 'Timmiejj1', 'Lukazarra1', 'escylap']