Maverick inquired whether, if Saitama's strong emotions didn't make him more powerful, if Garou would have defeated him.
That was the question.
Your comment, which stated that Garou's strength to the degree shown was due to just copying Saitama's power, not only doesn't answer the question in a proper fashion and thus is meaningless as Saitama's growth wasn't taken into consideration in the question but in fact was completely removed from the equation, but also wrong.
Since Garou not only copies people but also increases the power of what he copies with his own efforts, even if he didn't grow to that extent he still would have won which is the actual, relevant question.