Agree the photos are honestly a bit rubbish and probably don't do it justice. They all look a bit cluttered and untidy, and all the rooms look small, which I'm sure they're not, that's just the way the photos have represented them. The thing is, the agent might not like wide angle pics, but most properties do have wide angle shots (whether subtle or sledgehammer!) so comparatively, this is going to look cramped.
I would get all the shots done again, and really de-clutter everything - hardly any personal items at all. E.g. the shelves in the living room instead of stereo and CDs and books and basket and other random stuff, just put one thing on there. The mantlepiece, just one vase. I would move the chair out of the room for the photo and get rid of the little grey coffee table, the pink box and the rug - it looks like you might have a nice wooden floor under there which people go mad for, but you can't see it. Can you put a blind or curtain at the window, it looks a bit bare without anything.
Kitchen - move out of shot everything on the work tops except the toaster, fruit bowl, and maybe put those three jars (tea & coffee etc.?) on the other side of the cooker. Move all the things that are on top of the cupboards. Move everything on the window ledge.
Dining/conservatory - get rid of table cloth thing, and just put place mats on the table or nothing at all. I would prefer the table properly in the middle of the room rather than at one end, as it suggests lots of nice lovely dinner parties etc. rather than fishfingers in a hurry at 5pm. Take down that bunting. Move the BBQ out of shot and close the door. Consider taking the shot from the door looking into the room.
Patio shot - put the chairs in and sweep away all the dead leaves.
Garage/car shot - don't see the need for this. If it says there is parking for two cars, don't put a picture in there. Nobody is going to come and see the house on the basis of seeing the gravel, and in general it all looks a bit scruffy. People will be glad of the space, but the words are better than the pic in this instance.
Bathroom - move everything off the window ledge and move further out of the room for the shot. If necessary do two shots, one from each end.
Bedroom shot - just a badly composed photo. This is going to sound really weird, but the focus on the (wardrobe) door reminds me of the patio door, both photos seem designed to show someone how they can escape the room, not how nice it would be to live in it.
Nursery - looks lovely (I have an 8mo!) but it needs de-personalising a bit. Take away the changing table, the blanket on the back of the chair, the toy on the floor near the cot, if possible the thing hanging on the wall at the end of the cot (not the mobile), the bag hanging on the door, whatever that is hanging on the higher up door, the radiator drying rack, basically have nothing in the room except the cot, the chair with one cushion, the stool, the rug and the mobile.
Sorry if that's all a bit blunt, and people may disagree, but those are just my impressions as somebody who has never been there. Don't be sad, it's nothing that can't be fixed, and nothing that's even going to cost any money, but you've been badly advised re photos to be honest. The agent should have been recommending you get some done if he couldn't make a decent fist of it himself.
HTH
D