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I think this is a fair criticism. Delivered perhaps a bit acerbically.

As somebody who struggles with tact lately, would you mind sharing a kinder way to phrase the above while also being factually correct?

I used to be good with people, but somewhere along the way I became a jerk. Any tools in my tool belt would be appreciated.

Put yourself in the shoes of the person you're talking to, and try to understand how you are coming across. How would you feel if you were them?