You have argued that because you have encountered an abundance of job listings, therefore, employers have less bargaining power than employees.
Job listings are not a scarce resource. Any employer may create any number for any reason merely by choosing.
Your argument is fatuous.
The entire structure of the relationship between worker and employer is based on inequitable balance of power. Workers must sell their labor to employers in order to earn the means of their survival, in order to avoid destitution, homelessness, and starvation. Employers, in turn, benefit from a disciplined and stratified working class, and from a reserve army of labor.
The prevailing principle for workers, under the employment system, is work or die.