Very low FPS on game

Hello everyone, I just downloaded the WOTLK client with Legion models, everything was alright till I entered the game, I noticed that the game runs at very low FPS, I tried setting the graphics on "Low" but it still has like...10 fps I guess, I have a good enough PC for running the game, but idk why it has very low FPS, I would appreciate some help :)

Note: I have 8 GB RAM, AMD FX 4300 Processor, AMD Sapphire Rx 470 on graphics

try to disable all of your addons if you are using any