In my experience JDownloader 2 is the best download manager around, while at the same time being pretty shit. You have to be aware to go to the /jdownloader2 subsite to get the adware free installers, the "J" stands for "Java" so it's slow as shit, the official browser extension requires an account just to send downloads from the browser to JD2, Cloudflare's fuckery has been breaking a lot of sites, but at the same time I don't know any other download manager that has parallel downloading, account support, and a Captcha helper where you just paste a link to a warez download site and JD2 does all of the hard work for you.
You don't need to look for the one download button that's not fake, you don't have to deal with redirects, you can add an Internet Archive account and download shit from there at full speed with inline downloading so that it's actually viable to download games and shit from there, you can deep scan a website if you want to mass grab JPEGs or some other shit, and unless there is another free alternative that has those capabilities that's not Free Download Manager which was distributing malicious Debian packages for years, it really is the best. Even Internet Download Manager is lacking in some regards, and that's paid.