Competition and open economy

Government has a role as a regulator in competitive practises of enterprises. But it does not work out in reality. Sometimes it has to be competitor in the open economy. May it be in coal block allocation or oil exploration/extraction?  Government cannot play both role as a competitor and regulator, because it is a participant in competition. Sometimes policy excludes a competitor then how to determine which is “fair” Most times the more powerful firm tries to bend the policy to its own advantage, and government does not take the side of the weaker firm. So what is “fair” is ignored. Many times when the weaker enterprise is pressurised into selling itself to a stronger enterprise and it is called “merging” These events are hidden and not easily solvable. Government does not intervene. When acquisitions take place what is unknown is the truth and the weaker firm has no position in the strong trends of the open economy. Some firms have natural monopolies, for it has no competitors. And that cannot be controlled or regulated. Predatory behaviour cannot be distinguished from competition. Litigatory or Legal battles take too long to resolve and weaker firms give up their position to stronger ones without fighting for their rights. Whether anti-competitive behaviour is discouraged or not, the general state cannot be controlled or regulated. That is economy…Strongest wins no matter what. In any policy which is made there are deeper reasons which are hidden and which benefit the corporate(who is funding the party)These are the tactics which dictate that"the stronger is correct" and the "weaker is incorrect". So can competition can truely be regulated?