The smile says otherwise
This girl must be aware of the irony here – there’s no way this choice of shirt was coincidental. No one heads out to participate in a race or a marathon wearing a shirt that says “I hate running” by mistake. She probably wanted to confuse the other runners around her and give herself an edge in the race.
Running isn’t for everyone, and it’s not something you can fake – you either enjoy running or you don’t. If you don’t enjoy running, that’s okay – don’t discourage – there are plenty of other forms of exercise that might be right for you. However, let us get back to this woman – she clearly enjoys running (you can’t fake that kind of smile) so the shirt seems completely out of place.