Well there’s 6 straight answers (plus supplementary contributions) telling you what you obviously don’t want to hear.
Let me summarise it for you:
It is NOT for an employee to decide or judge whether or not a Cllr is “errant” - that would be the duty of the Monitoring officer to decide but ONLY in relation to a breach of the code of conduct.
A Chair, a PC or any individual might ask a Cllr to resign but frankly, whether that would be credible, likely or appropriate is highly questionable - possibly even amounting to a code of conduct breach through failure to treat others with respect.
A Cllr CANNOT be made or compelled to resign - especially just because an employee doesn’t ‘like’ them.
Be careful what you wish for.
PCs cannot select which Cllrs are ‘acceptable’ or otherwise.
It is ‘healthy’ to have differing opinions amongst differing Cllrs.
Most of the responses you have received have been notably sugar coated - but they all follow the same general consensus.
For my part, I find your question illustrates a fundamental disrespect for your employer who happens to be an elected member. This is unprofessional and objectionable. Your responses to the input you have received further reenforces and amplifies this.
Maybe you will take something useful away from this learning experience, but I rather doubt that.