Wow this sure is overstated.
The biggest actual risk here is ISPs doing deep inspection and getting data from private trackers.
Not nothing, but the 'RCE' they are claiming relies on an edge case and a lot of manual work on the part of a potential attacker who would also need to be able to intercept your traffic on the off chance you run qbit on windows and use qbit to install python.
I switched back to nzb full time last week. Don't need to run a VPN and it is more stable. It's still cheaper than streaming with 2 paid indexers and 2 paid servers.
Interface and features on par with any modern streaming service (continue watching, new episode alerts, library, categories, search etc), every show and movie all in one app, full speed, no need for VPN or worry about seeds (I've found shows with 0 seeds that work because it was cached on real Debrid) for $3/month.
Also supports a ton of devices/TV's. Dead simple to use once it's set-up, my parents and in laws both use it with no issue on Chromecast with Google TV after I set it up for them.
Oh and if you don't want to pay you can forget real Debrid and it'll still stream torrents at the cost of slightly worse loading times (but entirely usable, I did it for 3 years) but if you live somewhere that you feel the need to use a VPN for that, unless you also use the VPN for something else putting that money into real Debrid instead is worth it.