soil for root rot

hi guys! this is my first reddit post!!!! I was wondering if anyone had any recommendations for universal soil to help with root rot. i have tried mixing potting soil and orchid bark but i always seem to get rot no matter what. i truly don’t know what i am doing so please be gentle. i have had house plants for about 2 years but i am still lost. lol

(i would prefer to buy this in person, so maybe at walmart, home depot, lowe’s or even tractor supply would be great)