He said this in an interview with the YouTube channel Judging Freedom.
According to him, Zelensky faces a difficult question about what to do now.
"Because it's hard to say what will be the last straw and lead to their loss of power," RIA Novosti quoted McGregor as saying.
The analyst added that if Zelensky's rhetoric does not change, it could deal a severe blow to his political career in the future.
MacGregor also expressed the opinion that the only way for Kiev to avoid heavy losses could be negotiations with Moscow at this stage.
Earlier, McGregor expressed the opinion that the Ukrainian military wants to kill Zelensky because of his betrayal.
According to him, the problem of corruption in the Ukrainian army has reached its apogee and Ukrainian soldiers know about it.