>Healthcare

That's definitely a you problem, the US is the outlier here.

>30 paid holidays

24. Based on 6 day workweek. So 20. More is optional.

>Unions, Paid overtime

Rarely are there Unions specifically for the IT department. Employers here like "Vertrauensarbeitszeit", which means count your own hours, which usually ends up with you doing more (unpaid) work.

>weekends and calls off work come extra

Also very much depends on the job, many people do it without asking for compensation. In one place just being on call got me a good extra 20% salary, in another they refused to pay for it and now it's "non-mandatory" - but they know someone will likely still pick up the phone.

>Retirement

Biggest scam in history. I get the need for such a programm, but I'll be getting maybe 10% of what I put in out. Fuck being a millennial I guess.

>Flex Time

Already said. Mostly a negative because your performance review will check if your projects, planned with way too little time, will be completed. At least that's the case in development teams. I stick to platform teams for this reason.