The salary does not include crew food. Having to take your own is a bit inconvenient but you can control your diet and it's not something I moan about.
No, it doesn't include car parking which costs at most airports around £250 a year. Nor does it include uniform which was something like £409 up front when I joined 10 years ago and now costs me about £70 a year.
Medical is about £170-£200 a year. Yes of course it includes your sim checks. No one at Ryanair 'pays' for their sim. Contractors have €4.50 per hour deducted from their gross pay as one of several tactics by Ryanair to persuade the tax man you are not an employee. They can deduct as much as they like- net pay is what counts.
All in, I pay about £500 a year more (excluding food) as a Ryanair pilot for all the above. Hardly a deal breaker when I am home every night and am on a 5/4 stable roster.
Is it perfect there? No. Could things be better? Yes. I am outside your suggested age ranges and it works nicely for me and my family.