The message appears to be encoded in Base64. Here's the decoded message:

"QG5wdWIxMjI2MnFhNHVodzd1OGdkd2xnbW50cXR2N2F5ZTh2ZGNtdnN6a3F3Z3MwemNoZWw2bXo3

czZjZ3JraiBpcyBhIGJvem8uCg=="

"npub12262qa4uhw7u8gdwlgmntqtv7aye8vdcmvszkqwgs0zchel6mz7s6cgrkr is a bozo."

Please note that the decoded message doesn't seem to make much sense and appears to be a nonsensical insult.