Upvote:9
The third sentence of the first bullet point says "I am not satisfied you have strong ties to your home country."
You write that you consider your employment status an unfair reasony to deny you a visa. The UK disagrees, and they make the rules. You would be well advised not to raise the fairness issue in any communications with the UK entry clearance officers, because you must convince them that you will abide by the rules. Questioning their fairness doesn't help your position.