Yes, she has been deliberately and knowingly dishonest about some things. In light of that, it is hard to believe that her career is built upon well-intentioned and innocent mistakes. At best, she may believe that it's okay to lie to get the result which she earnestly believes is the right outcome.
For example, she might be completely convinced that CBT/GET/LP can cure ME/CFS, so deliberately abuses scientific methodology and basic facts to "prove" they are they cure. She might believe that she's doing the right and honorable thing with her work, and that patients would only oppose her work if they were unhinged militants.
Her view of the world may be fueled by delusions, but she is certainly willing to deliberately lie and engage in pseudoscience to create support for those delusions. That also suggests she feels a substantial indifference or even hostility toward those who disagree with her, if not with patients in general. Basic human compassion does not stop her from attacking others in the process of defending her beliefs.