Being unable to twist yourself into a pretzel, losing the will to meditate for an hour a day, not looking good in expensive workout leggings, quitting a cabbage-only diet on Day One - these are not failures. It’s just not for you. And it’s probably not for them, either.
At least consider alone time as an opportunity for self-awareness. Many people primarily see themselves through other people’s eyes, which breeds inauthenticity and discontent.