Power delete suite on GitHub . Copy a JavaScript and paste on the address bar while reading your profile. A new interface will come and can decide what to delete or overwrite
I ended up using shreddit, a Rust remake of an unmaintained Python script (https://github.com/x89/Shreddit). I had to keep running it over and over, but, I think that was the Reddit API's fault. If you end up using it, I recommend running it in a loop unless you want to keep running the same command over and over.
Anyway, it deleted all posts and comments, but messages in my inbox are still there. I'm fine with that for now but eventually want to clear that out I think.
If you're thinking of doing this I'd recommend running it before the API changes since the script uses it.
I ended up still using Redact since I already had it set up, and it managed to overwrite and remove all my history without issue in one swoop :) Thanks anyways for the alternative, I'm sure it'll help someone else out!