Over-Crashing

whenever im playing pvp, the game just freaking crashes all of a sudden, i experienced this about 13 times today and i would really want it fixed. For example, my game crashes whenever my skin is loading, whenever im playing on a server, or whenever im trying to get on my own world, this all started happening in the 1.16.20 update too...... im getting very annoyed at how much my game crashes and i would love for it to be fixed because i feel like i cant even play minecraft anymore......