[valanha]

Letting go can be very difficult. I would advocate for all suggestions already made in the comments so far, particularly working out and setting outside work goals. This helps create outlets and boundaries for yourself.

I try to remind myself that even if things are wrong, poor design, bad technology direction dictated from on high, even apathetic or stubborn colleagues, etc., I continue to try to find as much wiggle room as I can to make it as not terrible as possible, and never stop advocating for a better approach. I have found that repeating yourself enough, with evidence and data, eventually leads to others repeating it back to you as some new idea. It is a long game approach, but it does not fill that immediate change/feedback desire.

Ultimately you choose to change your company, or change your company. It is up to you to choose which one is worth your time investment.