Other than being one of the best affordable and privacy-based VPN services on the market, you'll bypass the "Connection Reset" error (which I'm sure you're aware of as you seem to have tried a VPN) which is far more likely to be caused by the 1fichier domain itself, continuously access links and bypass the download limits (detected either through your WAN IP, browser trackers, or a mix of both), and is compatible with torrents. Jdownloader may be able to access the domain, but on its own cannot bypass the download limit without additional plugins or tools.
These days, when doing anything related to piracy, especially for larger content, a reputable VPN is basically a must. Mullvad is a flat £5 for 30 days of use for you to go crazy. Even if you have no plans to spend money, nothing in life is truly free. So you're gonna have to compromise somewhere, or come up with your own solution, should you choose not this approach.