Sounds all about right to me .. the RH could be lower for flowering .. but that wouldn't do "that" to the plant, (i'm pretty sure it wouldn't)
Could just be a bit of beginners bad luck! Could be bad genetics .. or maybe some kinda early trauma is coming back to punish you!
Next grow, grab some recommended beans from someone at AFN (I'm happy to chuck my 2 cents in .. i'm not directly affilated with any of the seedbanks or breeders)
Get a checklist together before buying and run it past us - Like soil .. nutes .. what kinda water (RO .. tap .. etc) ... and we'll see if we can make this horrorshow a distant memory that some day you'll laugh about
(like this one from 8 years ago

)
(A "Tiering" experiment gone wrong lol)