You can probably narrow down what is causing it, assuming it's dietary which I will assume, by doing the most basic things. Eat the same meals everyday and see if your shit quality improves. If you're nearly shitting yourself, your shits are probably liquid or near liquid. You want those to be solid but soft.

Other people have already recommended it, but if you eat meat (I dunno what alternatives are, but there surely are some) you can eat like grilled or however you like it chicken, broccoli, and rice every day for a meal. Maybe two if you can tolerate it. Those three things are incredibly easy to "meal prep" aka "cooking" (not sure why people always have terms for stuff, but whatever). I cook myself like 5 days or so worth of all of them at a time and store them sealed in the fridge. Throw some seasoning on after nuking meals in the microwave... tastes fine.

That's the meal vets prescribe to dogs when they keep shitting themselves. So if you can stand to eat that and another meal (I usually eat eggs, rice, small amount of bacon so I can get tasty fats in my body as my other meal. Low fat diets make me go insane). And maybe a third meal depending how you want to live (I eat plain "old fashioned" oatmeal with a spoonful of peanut butter (yeah, the type with salt and sugar, sue me health people) and a banana sliced up in it for breakfast basically everyday) You'll soon discover if it's your diet or maybe something else.

You should also go to a doctor of course if you can afford it and it's an option. But if your diet is dogshit, packed with excessively spicy (as in hot not flavorful), sugary, or fatty foods, the doc is 100% of the time going to say "clean up your diet. Eat more fiber. Report back in [whatever time period]." Unless you have painful stomach issues or other kinds of cramps, pain, vomiting, etc. they are unlikely to dig much further than typical check up stuff and telling you to fix your diet since that's the cause of most people's stomach issues or bowel movement inconsistency.

Not directed at you, but I think a lot of people underestimate the simple logic of "thing goes in... things comes out" with food and taking shits. If someone eats a bunch of spicy hot wings, most of us expect to have a rough shit I think. By the same logic, if you eat a bunch of fatty foods like, I dunno, a lot of bacon or a whole bag of greasy chips, you should expect the resulting shit to be composed of a bunch of excess oils since that's what you put in. Your body doesn't need and can't process a whole bag of lard or vegetable oil or whatever your chips are cooked in... so it blasts it out your ass in the form of little chunks of shit floating in digested lipids. That's the exact recipe for your ass leaking. It's internally lubed with bacon grease and chip grease... think about it

(I know some of this is humorous in nature, but it can't be helped with poop discussions)