Easing back into running.

I use the C25K app for running when I started running outside, it's a pretty simply app for beginners, it alternates between walking and running and each week the running time is increased a little.

I agree with the C25K program, but why run if you hate it? If it is cardio you are looking for, maybe choose something else? Have you always hated it? I hate running on a treadmill and will only do that if it is really miserable outside (as in -30C/-22F with a good wind or a hard rain). Maybe try going outside?
Or do you have a dog to run with? My pups get me out even when I don't feel like it. Oh, and good tunes are a must!

I hate running inside on a treadmill, BUT my husband has really taken to it because he has a great music playlist. You can get songs that are the right tempo for you (slower, mix of fast and slow, etc.). He just loses himself in the music and the next thing he knows, his workout is complete. For me, I do the Couch to 5K program, which is amazingly good for a beginner to gradually increase distance. Can't recommend it enough! I'd guess people do it on the treadmill, but I did it outside at a local park and found that the changing scenery kept me from getting bored. Best of luck! And TAKE IT SLOW for now.

You might not hate it if you ran slower, especially at first. Jogging at a slow pace is very relaxing and you will eventually speed up just b/c you have to focus to jog slowly and maintain an even rhythm. I didn't check your age, but it doesn't really matter. Slow down. I'd work up to at least 30 minutes of walking at a brisk pace before switching to any running, and then target a 4 mph pace at first with walking/jogging intervals (which can be hard on a treadmill, but do-able). Slowly switch over from walking to running--start with 10% of your distance walking, then add 10% each week. Put the jogging in the middle segment of your work out so you warm up and cool down properly. So if you cover 1.5 miles in 30 minutes walking, make the middle .15 miles a jog interval. The next week, you add another .15, to jog .3 miles total in that week, each work out. Small, steady changes will be best and *never* try to work on adding distance and improving speed at the same time. That is the best recipe for injuring. Before you know it, you will be jogging the whole 1.5 miles and ready to start adding distance. Again, never add more than 10% per week. Once you get up to a steady hour of jogging, you can start working on speed if you feel the need--but there is no reason to run faster if it will make you hate it. Slow and steady can be plenty good for you, especially if you are more likely to keep it up over the years b/c it isn't such misery.

If you are stuck on a treadmill I would start bumping the incline while keeping the pace at 3.5mph. Try 2%. Next week at 3%. Once you can do 10% incline, the regular jog should feel easy.