That's why you have elections. It should be about democracy and transparency. The lack of notifications often gets raised at the AGM, but nothing ever happens about it.
For the exact reason I said. In my experience it's pretty common practice really to try and avoid headaches by not pushing this info out too widely.
If you want to be on the board you should be making those connections with the club well before the due date a month out and you should be across what is needed and the exact dates due to your own efforts to find out. If you can't be bothered to find out even that info off your own back how are you going to be a useful director?
The only people that pop up at the last minute are well meaning but underqualified/unprepared, or people with a gripe that want to cause a headache. If you are qualified but unprepared make the effort to be prepared for the next year.
If someone is going to the AGM every year complaining they missed the deadline to apply to be a director because it wasn't publicised then that person wants to be a director so bad they ignored it for 11 months until they got burned again by the exact same mistake they made last time.