Glitch, blocks not breaking or falling properly fades in and out

When breaking blocks, once it break, the block glitches by stalling then fades in and out. The block remains in place and it fades in and out, then when it decides to fall it continues to glitch in and out and when breaking above you, as it falls down to be collected it stalls and fades in and out as well at the same time falls EXTREMELY SLOW. IT HAS MADE THE GAME IMPOSSIBLE TO PLAY 1.17 as it has just updated the version. This has continued now for weeks, it began in the 1.16 version. I have reciently uninstalled and reinstalled and NO CHANGE,IT CONTINUES TO GLITCH AS DESCRIBED ABOVE.  I WANT TO PLAY MY MINECRAFT