I'm getting frustrated with all the Kodi updates and expired add-ons. Is there another streaming service that's easier to use and requires less maintenance?

It must be something to do with your build that you are using. Try to change your build to a better kodi build 19 Best Kodi Builds To Experience The Colors Of Kodi . And make sure you keep a backup of your original Kodi if you do not find any of the build upto your taste.

Go to you tube and search for ares wizard for the url to add the app and also get complete kodi setup wizard from google play store app to use for removing build and kodi file I believe is about aprox 125 meg. You also want the latest kodi of either 16.1 or 17.4 for more memory box. The kodi app will tell you if it is available to be used on the box you have. If 17.4 can be used on your box. If it says that you can not use it then you go with the 16.1 which is for boxes with only 1 gig of memory for program. There is many tutorials for most any kodi problem

There is a possibility that you have your cache filled up on kodi. You can clear cache on kodi by following the given steps at the end of this post. Secondly you can setup best kodi builds to continue smooth streaming.

Clear Cache on Kodi:

1. Open Kodi Jarvis > Then click on System menu in front of your screen > Now select File Manager > Double click Add Source option at the bottom.
2. Once you click on Add Source, a box will soon appear where you need to click on 'None' option and type http://srp.nu/ > Click Done > Type URL Name below 'Super Repo' > Click Done > Then click OK.
3. Once you are done, go back to Kodi Main Menu by pressing 'Esc' button on your keyboard > Go to System > Then select Add-ons > Then click on Install from Zip File > Super Repo > Then select Jarvis > Click on Repositories > Superrepo > superrepo.repo.0704.zip
4. Now select Install from Repository > Then Super Repo Repository [Jarvis][v6] > Go to Add-on Repository > Select SuperRepo All Repository [Jarvis][v6] > Hit Install
5. Go back two steps and click on Install from Repository > SuperRepo All Repository [Jarvis][v6]> Program Add-ons > Merlin Wizard > Install
6. Open Merlin Wizard, go to Tool Box option > Here you will presented with 3 options i.e. Clear Caches, Delete Packages, and Delete Thumbnails. The space that each of these options consume are also listed below these options.

19 Best Kodi Builds To Experience The Colors Of Kodi

If you are talking about a kodi box then you may need to clear the build and add another build. Try going to google play store and add complete kodi setup wizzard. All the tools to refresh the box are in the program. Check also you-tube for many kodi tutorials on what ever yo need.

Why would you buy kodi installed FireStick when you can do it yourself in a few minutes? I mean, OK, you don't have any problem to spend some additional money in buying Kodi preinstalled Fire Stick but what if you get problems later? It is always better to know how to install Kodi on Firestick as it will help you in future too. How to Install Kodi on FireStick

alot of Live stream Blocks by ISP's curently happening since April 2017 (Internet Service Providers) have blocked out of country region with Kodi last week, alot of people are having the issue, also many USA Streams have changed their codes so their content can't be streamed worldwide. best you try and find a new updated Stream List for Kodi on their forums.

You can reinstall kodi on firestick with a lot of methods but one of them is given as follow
Similar to other methods, this method too requires you to enable installation from "Unknown sources." Once you do it, follow these steps.
Before these steps
STEP 1: Search FireDL on your Fire Stick.
STEP 2: Install FireDL and Open it.
STEP 3: Type 600003 at the top blank space.
STEP 4: The above code will automatically convert to the Kodi APK URL and download will start without any further actions from your side.

You can then install some great addons and builds to further enhance your experience.
19 Best Kodi Builds To Experience The Colors Of Kodi