If you feel like you cannot confront them about their form of feedback, that could be interpreted as harassment and should at least be brought up to your supervisor, manager, etc.
If the harassment continues:
keep your resume up to date and make yourself open to work.
Inform your manager of the behavior from your colleague and tell them that it is inhibiting your ability to be productive and effective.
If the manager is unwilling to address the concern, that is when the backup plan of seeking another position comes in.
Make sure you have a written offer letter from another position before approaching the manger again.
This marks 3 times of bringing up your concerns to management and they have not been cooperative in providing a positive work environment. At this point, you will bring in HR to discuss ways to improve the situation or depart the company on good terms.
For further actions, you may consider blocking this person and/or reporting abuse
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If you feel like you cannot confront them about their form of feedback, that could be interpreted as harassment and should at least be brought up to your supervisor, manager, etc.
If the harassment continues:
If the manager is unwilling to address the concern, that is when the backup plan of seeking another position comes in.
Make sure you have a written offer letter from another position before approaching the manger again.
This marks 3 times of bringing up your concerns to management and they have not been cooperative in providing a positive work environment. At this point, you will bring in HR to discuss ways to improve the situation or depart the company on good terms.