Should i seek anger therapy?

Title is self explanatory. I'm prone to anger and I'm ashamed of it. I'm a nice person, nobody ever tells me otherwise. Some of my anger triggers are:

- When I'm struggling financially. Yes, I take responsibility for not checking my account balance often enough and giving in every time my ex asked me to buy alcohol just to avoid an argument. But when I tried to sell my stuff I swear this b**** at the pawn shop was looking down on me for having cents to my name. I guess nobody cares if I'm afraid I'll get evicted, right?

- Every time my ex treated someone else with more respect than me or acted like he was attracted to someone else. We had a lot of arguments and he only genuinely apologized maybe 2 or 3 times. Either he was too drunk to remember yelling at me and insulting me or he would bend over backwards to justify it. He said I "needed to control my temper" but I actually was never mad at him, no matter what he said or did, because I loved him. I did raise my voice sometimes when I felt disrespected or like he wasn't listening to me though. I tried to overlook everything until I heard him apologize profusely to a friend over something trivial, then say to another friend "we all need to go out to dinner sometime!" It was like pulling teeth to get him to go out to dinner with me, even if I was paying. I started to feel bitter and jealous towards both of them, and I felt bad because they're both very nice ladies. I was doing better but I'm mad all over again because he just recently said he missed me and apologized for everything, then went back to pointing out everything wrong with me and being snarky, and I thought "he would never talk to Leigh or Carla like that!" Another issue was him making a flirtatious joke with a coworker and liking my friend's pictures and joking about wanting to do her. I didn't say anything to him because I didn't want to sound controlling, but I do get jealous to the point of anger. I think I had some pent up anger regarding my friend since she stole money from me and assaulted my other friend, then my bf acting inappropriate regarding her was the last straw. I controlled my anger in these situations but I think the problem was I took it out on the wrong targets.

- Entitled people at every job I've had. Customers think employees exist solely for their benefit and one even asked me for something when I was clearly done for the day. It's frustrating because I don't understand how some people expect the entire world to bend to their will! I almost said something to management at my restaurant job about a coworker leaving her tasks unfinished for me to do, but they played favorites so it was a moo point.

- Every time I go over data and my phone gets laggy I scream "I DIDN'T USE UP ALL MY DATA!!!" as if that'll somehow change it.

When I'm alone I scream and throw things when I'm angry. I never do that around other people but sometimes they can tell something's wrong because my hands shake. I've had vivid fantasies of punching or choking the people I'm mad at, and I feel so awful about it. Sorry this was long.