The new wallet is just some kind of nightmare.
100% CPU usage + all available memory.

regular crashes

... It's almost impossible to use.
Developers - why did you do this? Are you deliberately killing an already half-dead coin?
Sounds like some rendering problems. There is a bat-file in the wallet folder to start with software rendering, try that.
Again, if you have technical problems come to Telegram or Discord and we can fix it.