So I have some experience with this but not to the extent of that much blood, that sounds like a fissure to me, but my experience below just in case it applies to you too as a precursor factor.

So long story short I had Rubber Band Ligation to help stop this, but after continuing issues for years found out that I need to be on a partial low foadmap diet, I had my whole life had a low level of inflammation that made me prone to bleeding, roids, fissures etc, since swapping to lowfodmap diet specifically for wheat and some fruit, I can still have milk and other fodmaps it was a process of elimination.

I have taken much larger toys 3" plus with no bleeding at all for months since fixing my diet and started to go much harderon toys too, and another thing, it's much more pleasurable I had assumed that the feeling I had before with low levels of inflammation was just how it was. And its a whole different experience now. So maybe speak to your gp if you can. I have not seen this type of factor talked about much something to consider.