Let this be a lesson to always keep your cards close to your chest when dealing with the people who give you your income. It's good careers advice too.
He has put you on daily signing to incentivise you off the dole so he can hit his targets without having to sanction someone in proper hardship.
Equality law doesn't cover things like this and in any case the DWP is pretty much lawless nowadays with things mostly depending on the discretion of poorly trained, badly paid zero-hours/part-time workers who are in an environment where they are not just encouraged but incentivised to make life as torturous for claimants as possible, and who are petrified of losing their jobs as they understand better than anyone what that will mean. I expect you can request a reason for why he put you on daily signing and if he can't think of anything to cover himself he may quietly put you back on to fortnightly signing.
Job centre staff are often vindictive bullies on a power trip - you basically have to be to succeed in the job - and he may be targeting you out of jealousy for going to university. He probably thinks you are an entitled middle-class kid with loads of creature comforts. That's as may be, but you are still entitled under the law to jobseeker's allowance.