I have never heard someone have this experience, however it is something you need to get used to and get better at. After about a week of getting used to it I have never seen poop on the toilet paper at all.

Never did a bidet, but I avoid paper to ass like a plague.

I mean, if I’m not home, I do it and whatever.

But I normally just go to shower and that’s it. Just clean it while showering.

When you are on a diarrhea and shitting multiple times a day, your ass starts getting irritated after so much paper. By simply cleaning it in the shower, you have no more irritation.

I’d give it another try, with a simpler bidet. Japanese bidets are overcomplicated butthole spas, you might have used ithe wrong settings.

I rinse with water while aiding with my hand to make sure it’s all clean and then use a dedicated towel to wipe it dry. I guess it’s slightly more inconvenient than just wiping but I’ve been doing this for well over 10 years and don’t really think about it.