Feeding and Pinching out, Confused

I don't grow broad beans so I can't advise you on those.

Garlic rarely needs extra feeding through the season, but if you didn't manure the soil well in fall, it could do with whatever you have.
Onions will always benefit from extra feeding, once every 2 weeks or so - and water.

Overwintered broad beans don't really need pinching. Black fly infestations start May June time, depending on the weather on young shoots, so these ones normally escape it.

I tend to top dress my over-wintered onions once in the spring with pelleted chicken manure. Worm juice should be fine.

Can give give broad beens a potash feed.

If the soil is well prepared extra feeds are not usually necessary for a lot of plants.