Umm, no. BEFORE you start managing the team one team has access to 45 million and the other has access to 110 million (as they can afford to pay waaay over). That's an advantage before we start looking at management and players etc.
They have access to this because of their success in the past. You look at all the teams that dominate diff sports world wide. Have been successful onfield hence why successful off-field, hence comes down to management, recruitment and large fan bases etc.
People need to get over the small team syndrome. There will always be small teams that always struggle because sporting competitions world wide are saturated with too many teams.