Hostile work environment after filing complaint in HR
Hostile work environment. Discrimination regarding previous maternity leave in writing and verbally. In-direct retaliation (adding work not in job description, requirements that no one else in the department is required to complete) Inappropriate written comments such as "the info I give you goes in one ear and out the other". Etc...
Talk to a lawyer SW .. I wouldn't even venture a guess based on what you told me.