Aging a buck in isolation, particularly without knowing the size and quality of other heads from the same area, the degree of competition, the local nutrition and foliage, etc. is nearly always a guessing game. Young, middle aged, or old is about as close as you can realistically get.
Photos can also be deceptive, particularly I find with mobile phones when it comes to perspective - my iPhone 13, for example, has lenses with 26mm and 77mm equivalents. This is a case where an additional frontal photo would really help.
I guess the question is asked with the thought that this buck might be older and going back? From what I see, the remaining length of the pedicles, the size and shape of the coronets, the lack of volume and the lack (and lack of extent) of pearling would suggest not.
I’d guess he’s a youngster and, if pushed for an age, perhaps a 2-year-old rather than a yearling, given that the back points are just starting to show? Like much with antlers, that’s not a hard and fast rule, but tends to be a useful benchmark for bucks on our ground.
For a comparison, here’s an old 4-point buck that I shot during the rut back in 2022:
Again keep in mind that the photos are deceptive, particularly in that it’s a short skull cut. The main beams are only just over 18cm, so no great length. However the pedicles are very short, noticeably so than other, better, heads shot off the same ground. Thick, sloping, coronets, as well as heavy pearling that extends almost the whole way up the main beams. A couple of years earlier and he would probably have been a sizeable 6-pointer.
When he ran in to the call I shot him thinking he was unremarkable, and it was only afterwards that I realised he was considerably older than I’d originally thought.
Thanks for posting the photo.