Why didn't Zach Braff get more chances?

Probably the same thing that happens to most huge TV actors, typecasting

Probably because Scrubs was not funny and his fans were douches.

GARDEN STATE came out in 2004. Big hit. His next couple of starring roles ranged from disappointments to flops, which must've made studio executives wonder if he had what it take to be a bankable star. After all, G.S. also starred Natalie Portman, so maybe she was the name that sold all those tickets? One of the flops was THE LAST KISS in 2006. Since Zach wasn't the director nor the only writer in it, and since it was a remake, the movie didn't completely reflect his voice, which must've made critics and moviegoers wonder if he really was an auteur. After that, either he stopped getting directing/writing offers or he chose to focus on SCRUBS. In fact, he has almost no acting credits before the show's end in 2010 (and keep in mind that he only appeared in a couple of episodes of the final season, so he already had free time in 2009). By the time he was ready to direct again, he was no longer a hot commodity, so he created a Kickstarter campaign for WISH I WAS HERE, which came out in 2014. Usually, you can see how a director's style evolves over time, but if you only make 2 movies in a 10 year span, the second one will feel way too different. It was a flop too, but maybe it has to do with the backlash. Many people thought it was unnecessary for a rich actor to ask for funding this way. You'd think that was the end of his career. However, he was offered to direct GOING IN STYLE in 2017. It performed well at the box office and the reviews weren't as negative as some of his previous works. However, it was clearly a paycheck job. Unlike THE LAST KISS, nothing about this movie reflected Zach's voice. It makes sense, since it was another remake and since he didn't write the script. Luckily, he's still getting acting/directing gigs in TV shows to this day. And months ago, he released a short film (in his own voice) that got enough notoriety.

I think that guy killing himself after watching Garden State was the final nail in the coffin for Braff's career.

Garden State came out in my freshman year of college, everyone in my film organization obsessed over it, but I hated it. I felt it was smug, superficial, and pandering to late Gen-X/early millennials desire to have their generational movie that "got them", like The Graduate, or Reality Bites, or Singles, etc. I wasn't into The Shins, my brand of quirkiness fell more in line with what Charlie Kaufman was doing at the time moreso than what Wes Anderson had been doing. After Garden State, every indie film we produced in the organization owed something to Garden State. I led the script committee and always pushed for the horror movie scripts to get made, because horror is fun, its cheap, and there's nothing worse than non-actors trying to deliver cute, quirky one-liners. Braff did get another chance though with Wish I Was Here.

hes a bit of a hack honestly. 

Didn’t he direct the Going In Style remake a few years ago?