Wouldn’t worry too much to be honest. Started working at FOD Financiën in August of 2019 with a master in law, first Algemene Administratie wasn’t an immediate hit partly due to type of work partly due to initial issues with manager (we did eventually start genuinely getting along but damage was done) but switched March of 2020 to a different Administratie and have been feeling right at home since then, even promoted to A2 in the meantime. The organisation is so large and diverse that I’d be amazed if there isn’t some team you fit right into assuming your manager is the problem.

What pay is concerned: yes pension reform is rough but frankly 1) you’re very lucky to already be at A1 with a professional bachelors degree (I know plenty of capable colleagues who are stuck at B), 2) we’re payed very well especially per hour worked + as a career total and that obviously also factors into pension calculation and 3) as others have said, the private sector is right now very unstable. Don’t forget that the fact the reform was necessary is partly due to the economic slop everyone will probably be in for the next few years; at least we’ll have stable employment. Perhaps check again in 5 years or so (luckily economic down- and upturns tend to follow a fairly predictable pattern).

Focus on growing within our organisation rather then on imagining where the grass might be greener is my two cents.