Hey, I work in contract law, albeit commercial, not corporate. I do think you are on shaky ground, and I don't think the reasons you post here suggest anything for breach by employer, sadly for you.
You would also find it difficult to go down the constructive dismissal route, and to be honest you should just find something more suited to you, as this job clearly isn't. If you are taking sick time, use it constructively to find another job, because you won't win
