There's one user who types like that and it's @Dot. If you can't see their profile, maybe it's because your account is new. Anyways, this is what their profile says:
"Hypnsis injry lft self scard of slf on deep lvl, 2 point whre am scrd of own innr vce if read bck wht typng. Redcng lttrs chngs how rd bck in head. Am unabl 2 lk @ own handwrtng, own bdy or own reflctn in mirror. Am also mute. Am terrifd of frnds & ppl in lfe b4 episde & am nt abl 2 engge w/ fmly, incldng 10 & 8 y/o nce & nphew. Henc nw on SaSu".
I'm not exactly the best at translation but this is my attempt at translating it:
"Hypnosis injury has left me scared of myself on a deep level, to the point where I'm scared of my own inner voice if I read back what I'm typing. Reducing letters changes how I read back in my head. I'm unable to look at my own handwriting, my own body or my own reflection in the mirror. I'm also mute. I'm terrified of friends and people in life before episode and I'm not able to engage with family, including 10 and 8 year old niece and nephew. Hence I'm now on SaSu"
It sucks at how cruel life is to some people :(