On the social media post, Microsft started the tweet by making sure everyone knew it was aimed at people in the account's replies that always posted "the PS5 is better." The official Xbox account then went on to state that the best console is the one gamers prefer playing.
To the people in our replies saying ‘PS5 is better’: — Xbox (@Xbox) July 16, 2021
The best console is the one you enjoy playing. Have fun!
Since all the comments seem to be from people who prefer playing the PS5 this means Microsoft has conceded that the PS5 is indeed the better console.