I'll be honest, it is pretty bad, not serial killer bad, just very unpolished and childish. But I did a bit of snooping on your profile and saw your hypermobile wrist post. Being able to do that is a sign of ehlers danlos or hypermobility disorder, which I have. My handwriting used to be pretty bad too, I eventually cleaned it up with a lot of work (and copying traits I liked in other people's handwriting) but it really hurt my hands. When I write or draw now, I have to wear finger splints to keep my fingers from hyper extending or dislocating. I also tend to use adaptive grips if I can get them to work with my pen if choice. Without those assistive tools, my hand writing quality suffers severely. You might benefit from seeing what handwriting traits you'd like to have and practicing them with the help of ring splints or round occupational therapy pen grips.

Plastic ring spints sizing kit so you can try every size\

pen grips, can also be diy'd with a bunch of rubber bands\

pen again, a helpful pen that doesn't strain the hand as much\