I own since June 2018 a cell phone and you would buy a new phone, if it lags all the time, it even goes out in the rare case or the screen is 'frozen' and the display is broken, because that's mine Mobile. It still works, just see things I said.
Yes I would.
Yeah, I would. If the phone gets stuck all the time, it's kind of stressing. And you'll be able to admire BTS 'beauty without a broken display (Jin) 😍
I'm not a friend of "new purchases" and currently also have a cell phone from the year 2013.
In between, I had the "Y6 2017" for a few months, because mine was broken for a short time and was quite taken with it. - Price / performance has definitely fit.
When my girlfriend broke her phone, I took care of getting my 2013 device up and running and left it to her. - By the way, she is also very happy with the part.
As for the hardware damage (display), I can't comment. - Depending on how bad that is, I would look for a replacement display and hope that a barter over new purchase is worthwhile.