Not true.
T.R. was against monopoly. Against restraint of trade...internally. Against foreign dependency. So as to promote more opportunity...internally. He was a nationalist. I suspect you are one of those who are unsympathetic to Roosevelt because he openly called a spade a spade...such as J.P. Morgan:
In 1902, Roosevelt went after Northern Securities, a railroad trust controlled by J.P. Morgan, labeling the financier and those like him, "malefactors of great wealth."
This site sums up Theodore's business positions well.
Although sometimes portrayed as anti business and as a "trust buster," in fact Roosevelt was neither. Roosevelt did believe, however, that there was a public interest higher than any private interest, including the wealthiest. The square deal program, thus, while calling for business regulations did so in the spirit of creating greater cooperation between government and business, and business and labor, on behalf of what Roosevelt thought was the larger common good. In this vein, privately and politically, but not publicly, Roosevelt advocated the federal incorporation of large firms. With this device, never enacted, large firms would approve their charters not from the states but from the national government. A national agency, such as the Bureau of Corporations, thus would have the ability to ensure that private investment decisions occurred within the framework of the public interest.
Theodore Roosevelt was hardly anti-business...as this account of his relationship with JP Morgan by Jean Strouse shows...but he was a man who believed in law...for all...high and low, describing our government as:
"a republic such as ours can exist only by virtue of the orderly limit which comes through the equal domination of the law over all men alike…as shall teach all that no man is above it and no man below it."He was a true patriot.