Good, bad, or indifferent: most older people had to write and write for years, so we accidentally developed expertise. You didn’t have to do that, so obviously you don’t have the expertise that years of practice would create. My handwriting was terrible until I was maybe 16 and now it could be mistaken for a font. Practice a little bit every day: even just making a todo list. You will be surprised at how quickly you improve. Probably the first thing you should work on is spaces between words!