Tampermonkey will do what you need. It’s not point and click, but writing the custom script shouldn’t be too difficult for someone very new. You essentially just need to complete a find and replace upon page load. The %2F and similar costs are just ASCII characters in percent-encoding and can easily be parsed.
I’m unsure what benefit you get from this though. It seems skimfeed is just trying to capture which lists and posts get visited so they can adjust the site according to popularity. Doing this via an exit link removes any need for cookies (which I didn’t check for, so maybe this ain’t what they’re using it for).
Take a week and build a Voron. The kits are super easy to piece together and you end up with an insanely great, reliable printer for a fraction what it should cost. Yes, the build time and initial calibration might take a bit, but mine’s been without issue, printing 24h long prints perfectly for over a year now. You don’t need to settle for a mediocre built printer if you have the patience to piece together one. Not to mention, since you built the kit, you know how to troubleshoot any issues that pop up much faster than something you pulled out of a box and plugged into the wall.