minecraft 1.13-pre3 crashes when i press esc and lags horribly

i couldnt find anything close enough to this problem when i search when i play the game it lags horribly, and loads random chunks very inefficiently and i cant figure out with the power i have available why it cant run faster. it crashes when i press esc to open the menu. Specifically i am playing the java version on a windows 10 machine, i am not playing the xbox windows 10 version.