For "more dishonest":
* More dishonest
* Less truthful
* More deceptive
* More mendacious
* More fraudulent
For "more inaccurate":
* More inaccurate
* Less precise
* More misleading
* More erroneous
For "more misleading":
* More misleading
* More deceptive
* More fallacious
* More spurious
For "more unreliable":
* More unreliable
* Less credible
* More dubious
* More questionable
The best comparative word will depend on the specific context and the nuance you want to convey.