The best thing that ever happened to me was having a 23’ single screw inboard as my first real boat for about a decade. It teaches you about things such as spring lines, wind and current as a matter of course. More than that, it also taught a young indestructible personality about the importance of humility.
Anyway, I have the benefit of thinking about springs as a matter of course, not as an advanced skill or luxury. It’s a big part of why I bought a 48 with a full walk around and single hand so successfully (knock on wood). When I see people who use their thrusters to leave a dock with their twin screw bow out, my brain hurts a little. I almost always leave stern out. It just makes more sense more often than not. With twins especially, it just gives so many more options.
If I want to leave a parallel dock, it’s almost always rudder hard over to turn the bow into the dock and idle thrust on the outboard engine. Same as I would have done with a single screw. I’m also not afraid to gently rest the bow literally on the dock and push on that to help bring the stern out quickly if needed and I’ve never had to do gel coat repair as once the bow kisses the dock, it’s not moving. With a single the prop walk being a factor if there is wind or current, the easiest thing is to pivot out a full 90 degrees if that gives you the most benefit before backing.
The other interesting tip is that after you have done the maneuver more times than you can count you realize that at least when departing, you rarely actually need the spring line and you rarely actually need to push on the dock. Its nice to have it there, but after awhile it becomes almost unnecessary. Landing is different and springs are almost always a huge help if you can use them.
For you though, I wonder if a single screw is still your best option. Nothing about docking on any boat should rely on an individuals strength and I worry you learned to rely on some bad habits instead of learning the boat. But referencing that humility component, I also know that sometimes things just don’t go perfectly and on a single screw you can exhaust your options. So at a minimum I would think about thrusters, but thrusters don’t have to be, but can, be a huge vector into bad habits as well. I’d rather you learn how to more properly back out from a parallel dock first. Personally I’d consider switching to a boat with twins, if you were up for it. So much easier to control, but also more complex, and still requires the operator to have a plan. That’s a question only you can answer honestly. But something has to change, because personal heroics are not the key to maneuvering any boat.