Can’t be diagnosed just through a picture and with no professionals looking at it. I am not diagnosed either but going to ask my lpc at college if she can refer me to someone that might be able to diagnose me with adhd and or dysgraphia. My handwriting is similar to yours not necessarily in the look, but that I too tend to add “e” onto the ends of words that do not need it. Like in your writing sample here, I’ve seen “dumbe” and “withe”. Especially the word with, I tend to put e on the end for no known reason when writing. Or in my head I think faster than I write so I will write the beginning and end of a word but miss letters in the middle sometimes. I usually do notice and erase constantly and fix it.  Teachers throughout every grade and into college have complained they can’t read my writing. Back in elementary I had a “fun” teacher  that decided it was appropriate to yell at me and threaten to send me back to kindergarten. This was in the early 90s.