I recently joined a company(for less than ideal reasons) knowing they don't follow basic software practices. I felt frustrated in initial months and then took o

I recently joined a company(for less than ideal reasons) knowing they don't follow basic software practices. I felt frustrated in initial months and then took on challenge of evangelizing and implementing X. But I'm getting too much resistance from "senior" developers who've been there for 15-16 years. Everyone agreed to do X and circumvented it the very next day. This consumed so much of my time(outside office hours) and energy that now I feel why do I bother making a change when I'm not getting paid or even recognized for it.