<human>: Can you summarize the given text in a few sentences?

I work in IT and just changed my job from a small start-up to a mid-size corporation (yeah, I know). My new job pays significantly better and gives me a proper title (Sysadmin as opposed to Desktop Support who works as sysadmin). 

Fairly quickly, I discovered that my new job is actually worse, even though I make more money and don't have to work with end users. My new team has a few 'older' people, that it seems learned their IT skills from the pre-NT era and don't think that anything should EVER change. Some of them are rude, arrogant and generally not fun to be around. In contrast, my previous team was young and fun. We used to go to lunch together, and some of us hung out as well.

How do I quit this job without jeopardizing my future employment? I was very well liked at the previous company, however my ex-boss took my resignation very personally (I was his first employee to ever quit) and called me all kinds of names in anger (there goes my reference).

Alternatively, how do I make my life bearable at the new company? I am passionate about IT (it's not just a career for me) and I previously worked as a 'jack of all trades'. I don't want to sound arrogant, but I know more about today's best practices than those 'senior' guys.
<bot>: I quit my cool jobs for the one that pays better and now I regret it. How can I escape and get my soul back?