To a degree, sure, but is it really 'MITM' if the site you are trying to visit has chosen to add cloudflare into the middle?
You may as well say all load-balancers are MITM because you might connect to a different host on each attempt and there's a man in the middle influencing your connection.
What makes it any different if the website executed the same logic cloudflare is on their own box?
Cloudflare with their "checking if the site connection is secure" (while being MITM) is another example.