Kodi not working as well as it did weeks ago

I currently run Kodi on my Nvidia Shield, the last week or so ive noticed the program seems to run slower, and in fact, now when i pick a provider it usually goes through the first 8-10 to a lower quality provider… im not overly tech savvy… i reset my router, rebooted Kodi… according to the speed text i shluld have no problem uploading high quality streams… so is the issue likely Kodi.. or maybe theres just no good files of the shows i want to watch ( for example it used the 9th provider in game of thrones season 4.. and the quality wasnt all that good)… what could the likely culprit be? Thanks