When it comes to weightless or reclaiming any aspect of our physical health an integrated synergistic approach of diet, fitness, and "self help" works best.
Maintenance mode is actually much easier than weight loss mode. All you need to do is balance you calories in with your calories out. Simplest way is to buy a pocket calorie counting book or use an ap to count calories in and then invest in a body media device to monitor calories out. If you don't eat more than the calories your burning you won't gain back weight.
There are many things that could be happening here from bursitis to patella tendinitis to ITB syndrome. I highly recommend a session with a physical therapist so you can be diagnosed and the appropriate exercise and stretch regimen can be prescribed.
Eat about an hour before you train. Not too much or you will likely get cramps while training. A snack consisting of an equal blend of macronutrients is ideal. Something like an apple with almond butter or a whey protein shake with So Delicious coconut milk. This will help keep your blood sugar stable and your workouts energized. After training you want if you are trying to bulk up you'll want to eat within the hour and you'll want plenty of amino acids. If not I would recommend sticking to your daily eating schedule. So if your eating every four hours wait until your next meal and again shoot for a blend of high quality macronutrients. Quinoa with salmon and vegetables is an ideal example.
Try core based training modalities like yoga and matt pilates.
Leptin is a hormone that regulates energy intake aka appetite and metabolism. It's important that you balance leptin levels for optimal metabolic function. Sleep has been shown to help and consuming white fish like cod or snapper.
Try different veggies! You're not locked into something you hate. Broiled carrots, grilled eggplant, sautéed spinach - the options are endless surely there are a few you'll like. AND try cooking your veggies differently. This will help you find variations that you might like.
You are preaching to the choir with that statement. Despite my constant pressing of the producers to show more of the deeper internal work, Biggest Loser is a game show at the end of the day and they were not open to change the way they produce their show.