Help! SOS! Tired of jerking, In need of another wa

I need help!
I've been trying to find different ways to blow my load with out having to almost pull the skin off my dick. I jerk so hard that I sometimes end up bleeding. I've tried other things like: wearing nylon panties when i got to bed and rub against my satin matress cover, humping my satin pillow, rubbing against a stuffed doll wearing panties and etc. When I tried these things and others I didn't even feel anything so I didn't even get hard so I give up and go back to jerking off. I have even bought this cheap sex doll that has and opening in the front and back, its basically more like a tunnel to help your imagination, and I've fucked it but it doesn't feel that good and I end up going from boner to softy (I also need a a lubricate something good, the sex doll is called Big Babe Bella if anyone has heard of it)
So I was hoping that if anyone knew what I'm doing wrong or knew of any tips, tricks or techniques would be really helpful

If you have any Ideas, tips, tricks, techniques, or advice please please please leave a comment
Thank you