[Q] Advice Needed - Life after a BRICKED TF300TL topic

Dear fellow TF300 users,

This tablet of mine was holding onto STOCK rom until I couldn't take its lagginess and poor loading of images even when using my company email. So I decided to take on the route to ROOT, UNLOCK, Install new custom ROMs...

My tablet AsusTF300TL has been successfully UNLOCKED, Root and even installed a new ROM (KatKISS 4.4.4) . Its recovery was TEAMWIN - TWRP. The tablet even had its encryption data (due to my company email policy.)

Even with all this, it still behaved very sloppy, laggy. I really cherish this piece of IT equipment. Untill I downloaded the recent OUTLOOK Preview App and the app asked me to perform encryption again. This went hay wired as the encryption wasn't succesful and I had to enter into recovery mode. Best of all, I backup my ROM only in my SD Card but in recovery mode, it couldnt restore successfully. I can't copy the backup file from SD card to Storage.

So I took some advise from the forum here to unbrick my tablet. It was successful, and I tried it again with Outlook Preview app. This time I was on stock ROM and still encrypton had issues. Interrupted halfway, going into TWRP recovery... and use the same UNBRICK method all over again.

I believe now, my tablet is on Stock rom, and nor ROOTed and I reckon I will need to reinstall back TWRP recovery. Definitely, for sure it is UNLOCKED as I tend to restart the tablet and I do see a short liner, tablet is unlocked..

But with stock rom installed, after being UNbricked, the tablet still behaves very poorly, laggy .

Tried to check on storage details, it is newly formatted, barely 5% of space being used. RAM used always tend to be hovevrying about 65% to 70% usage.

I wish to find out if there's anything else to improve this situation, should I try out new custom ROMs? Further to that, this tablet has been with me for almost 4 yrs, and its ON OFF button has been very insensitiev... it requires a harder force.

Very troubled...
NIKEIAN