People are often trying to avoid changes and usually this is seen negative as missing flexibility. I do consider myself of being flexible, but I do feel inner resistance to some elements of my new job. Analyzing the situation I find that this resistance has a simple reason: Some things worked better and more efficient the way I did it before. Not everything that is new, is better. But on the other hand, there are pretty reasons why things are done in other ways at other places.
Different companies have different focus, different countries have different cultures, different craftsmen need different tools, different software has different flaws, ... - and people need to adapt with their thinking, with their decisions and with their way of working.
However, there is always potential for improvement and wherever you go, keep in mind, that your input - the input of the new person with new ideas is very important. The big mistake is, if you judge everything new being wrong or done in a stupid way. If you act this way you will get negative responses and road blocks wherever you turn.
Before you change things you need to investigate in detail why the things are done currently the way they are done! There might be pretty good reasons!
Then, when you have analyzed the situation - then is the point to discuss evaluate possible alternatives and discuss this with the right people. A single person can improve to a certain level, but a complete team getting better and better by collaborating - that is real power.