After I rooted mine I got on the Kodi train. That went tits up front, especially Exodus so then nabbed Terrarium TV. Useless, half the streams never worked and needed constant updates.
All in all, wrecked my entire stick as its now slow as dead snails. I don't like the video clips sideloading, adds to the chronic pace. To make matters worse, if your an Amazon Prime user, its a proper pain to find prime content among the non prime content .. what genius decided on that? Used solely for Netflix on the TV.
in short, imho, these sticks are a pile of shite.
Sounds like you wrecked your stick mate,easy fix is to factory reset it.
With regards to Terrarium,it sounds like you didn't have the correct codec because before a few days ago it was near damn perfection,some links wouldn't work but most do and the updates were from the developer,he sent them out when he updated the scrapers.A modded version has been released since the dev pulled it and whilst the initial mod isn't perfect it will get better as I expect somebody to take it over and rename it,it is also ad free.
Kodi isn't dead,add-ons come and go but it still has some amazing ones.
All that being said,if you're talking about Exodus then you must have a 1st Generation stick,they're still decent,you just have to keep up to date with your cleaning,force stopping apps and clearing cache & also going into Es Explorer once a week to run its cleaner,that removes all the rubbish data,old apks and the data left from any adverts.