Who are you going to apologise to? Stop! I’m not thinking for you to list the people who you have let down. Even if you could come up with someone to apologies to, instinctively we know you are doing your yoga for yourself and judgments like that are not going to help you achieve intimacy.
There is no reason to doubt yourself, especially when it comes to doing your Yoga, your practice. There are great advantages in understanding the principles of Yoga and working the body with the breath and the mind and understanding, bundas and pranayama, these concepts are important and proven but if you are not incorporating all of the Yoga principles it does not make your Yoga wrong.
It is worthwhile having a map for your practice and it is worthwhile to consider the things that went well, perhaps the time of day, the length of retention and the forces of the bunda and the stillness and connection to your pranayama. But when we judge we often think of the things that were not so great, and although those challenges can be helpful to reflect upon for future practice, its only a perspective in a very dynamic existence.
You are conscious and that means you can appreciate you are part of the universe. And you have every right to tap into that, and more power to you for being yourself.
So try this. For a while, if we drop trying to get somewhere, and we smile, close our eyes, and ride the breath, inhale and acknowledge the difficulties of our past and appreciate what we learned, then exhale we release the mind and watch the breath. Give the mind a rest.