I understand the feeling, I'm not into modern down-tuned stuff either.
I would perhaps suggest Warren Huart's produce like a pro and Bobby Huff music surgery youtube channels for mixing advice that isn't geared towards sounding like slick, anemic, boring modern "metal."
It really is a PITA to try and recreate more vintage sounding recordings with modern drum samples, I've spent years and years working on it.
There is a reason people pay others to engineer, mix, produce, master recordings - it isn't something you can just "do" with no training, experience or practice. Just like learning guitar, it takes time and effort.
If you would like more in-depth advice or have questions, feel free to message me.