That would have blown off apps and put it back to the beginning. There may be some delay as apps update again, but usually that's it. As in usually works.
Did you ever? Install APKs from outside the store? Is the CPU running at full tilt?
How advanced an user are you? Here I'm on a team writing Android apps so we can use https://developer.android.com/studio/profile/cpu-profiler.html
Others may try Termux. Look at this Discussion.
It covers the usual built in task viewers but see if OS Monitor works.
Suddenly my Lg G4 is sluggish and unresponsive. Button pushes don't register, or are delayed, things from the play store download slowly, but freeze on install. I have tried all basic fixes, restart, clear cache, remove sd card, safe mode, factory reset, new battery, reduced animation scale and disabled dual window...all with no rewards. Any ideas would be very helpful. Is this a hardware problem that can be fixed? Thanks in advance.