Love cars, love driving, and towing is just an extension of that.
I can back a semi and a box trailer, and if it fits forwards I will get it in backwards. We had to for our driver training in the RAAF.
An unusual fact though, don't fret if you can not reverse a trailer, the smaller(shorter from axle line to tow hitch) it is the more difficult it is.
A short trailer makes movements and actions(turns) super fast, therefor you need to predict and start the reaction turn or change of direction before you actually need it, otherwise it is always too late.
Backing a semi trailer, is like knitting in slow motion, as easy as pie, as long as you can use a mirror.
Towing, maybe difficult too, because being longer the turning action is slower, and therefore some drivers cut a corner and good bye traffic light or street sign pole, as well as the corner of your home/garage. See how wide a truck/trailer/bus etc takes a corner, over the white lane line so the back end does not side swipe anything.
I hope you can now understand what you are doing wrong, how to help avoid the jack knife moments, and why we give long vehicles a clear berth when they are turning. Drive safe.
Remember, if you are ever towing and need to reverse, but can not, pull over first out of the way, and hop out, pretend to faint and some bold knight will help you to some shade and then reverse it in for you.