u/Internet-mctuber

I recently bought a new pc and gave away my old one but my ethernet or internet sucks, it was the same on the old one and its happening now too, when playing games like minecraft online I randomly get Massive lag spikes out of nowhere one moment im playing on 40-60ms then im suddenly at 15000ms or so my flarial client tells me and i get instantly disconnected from the game, any ideas on why this is happening please if you do help me. Additional Info:

My ISP is subishu

network speed is 2.4G

router is Huawei EG8141A5(dont think you need this tho.)

I tried everything google told me nothing seems to fix it I've lived with this issue for more than 2 years, Help me if you can!