There's no way to change what he wrote. Only Airbnb can change it and only if it violates Airbnb's guidelines.
But your reply is key. Your a good opportunity for you, to make the facts clear about the cooking facility, and more importantly to make yourself look good. About the kitchen thing, merely state the facts about the cooking facility, as you have done in this discussion. Leave out any opinions, judgements or feelings. Say nothing personal. Just facts about the kitchen and leave it at that.
At the same time, make the wording of your reply professional, fair, diplomatic and caring. Any person reading your reply will formulate an opinion of you based on what you say and how you say it. More importantly than just as a rebuttal to his negative review, this reply is your chance to make a good impression on potential future guests.