cocoonWhen you're playing scout against soldier, it's important that you don't let yourself fall into auto-pilot mode.
You have to be very conscious and in the moment about your movement, otherwise you are going to be predictable and have poor engagements that you won't be able to win. Also, on a larger scale, be aware of your positioning. Don't overextend for a kill unless it is going to benefit your team. A lot of times, you really just have to get in, and then get out, or, in other words, throw out some damage, and then immediately go support a teammate that needs help.
Also, on a smaller note, in lower level matches, soldiers usually abandon their medic at mid to gain height advantage. When they do this, you can usually land an easy medic pick, because nobody is protecting him, so be aware of that.
Abandoning their medic at mid is a really common strat for soldiers no matter what their skill level is. most teams will leave a scout or two and a demo with the medic while the soldiers jump and do damage. at lower levels its pretty likely they wont pull this off perfectly but its important to remember that its not just soldiers who protect the medic.