Better to spend some more for a Poco F1/ Redmi K20 and flash a custom rom on it. Realme's UI is same crap as Oppo's or Vivo's UI.
Dude... you are getting it wrong.
My bro is using Real Me1 and still gets regular updates on it, though a quite behind after Nokia on updates but still its a good UI.
Never ever he complained about any lag or freeze. and got the latest Pie updates few days back.
PoCo F1 is old now. Redmi K20 is an excellent phone but the MIUI is much worse than the Color OS.
Once the RealMe OS is launched, it will be rolled out to this device also
OS can be flashed to some custom ROM, which I will do after some days (if I get bored of the stock OS)