Employment Law Questions? Ask an Employment Lawyer.
Unfortunately, unless you can point to a specific form of discrimination that is at the heart of this issue (based on race, religion, gender, age, disability or recent medical leave use), you have not mentioned anything illegal.
An employer has no obligation to post a job. Hiring someone with less experience is not, itself, illegal. Not allowing others to be considered for a job is not, itself illegal. Ignoring workplace issues is not, by itself, illegal.
For those facts to have any usefulness, from an employment law stand point, they have to point towards discrimination, such that, you can claim disparate treatment based on race, religion, gender, age, disability or recent FMLA use.