Yeah, it can be tough to change your stride, but consistency is key. I do my high-knees and fast-feet exercises on a track, it helps me focus on my form. Try to incorporate them into your warm-up or cool-down, it'll make a difference over time.
I feel you, treadmill running can be a real mental grind. For me, it's all about creating a routine and sticking to it. I set a schedule and try to vary my workouts as much as possible - intervals, hill repeats, you name it. It's not the most exciting thing, but it gets the job done. And hey, at least you can't get lost or caught in the rain!