He's totally gorgeous! Is it the left front they are claiming is "club foot?" It looks at a steeper angle than the right front, but definitely not outrageous enough to make him lame as long as you have a good farrier who can trim / shoe him every 6 weeks and keep his front hooves balanced. And when you ride him, make sure you spend equal time going in both directions, even though he might not bend as comfortably going to the right, and might protest because of being uncomfortable.
What joint did he get injected in? (supposedly injected "wrong", but we'll ignore that for now) Was it in the left front fetlock, or maybe the knee? The way he stands, and I definitely can't tell just from a few pictures, but if he always tends to stand with that foot in front, he might have discomfort in that heel, and the problem might be Navicular syndrome, where the small clamshell-shaped bone in between the coffin bone in the hoof and the small pastern bone, gets pressured and starts to develop bony growths. There are many other causes for heel pain, but even if navicular is an issue, a good farrier can help horses with this problem. They can trim him or put on shoes that are designed to raise the heel and take pressure off the navicular bone, so your boy can walk,trot, canter, even jump, pain-free.
I wish I lived near you, I'd be a total scam artist and tell you he was hopeless, and make you sell him to me, LOL.
Seriously, I'm kind of jealous because he looks like such an awesome horse with a ton of potential for low-level eventing that I want to do, except for a bit of vet and special farrier care and rehab that he needs.
If you can find a way to own him, in a way that your parents, husband or partner, you and your work salary or whovever pays for important things, can pay for his care and get him extra farrier care, you should definitely do it.