Bro Its always same from Samsung. I had a M40 last year ,where I purchased it for 20k. In that I got LCD display and core ui. And also 3500 mah battery. So next time when you purchase a phone check all its specifications
But those all you specified were covid19 brands better not to use smart phone if I got options all from the china brands. Don't worry I too started using this from December19 by purchasing for ₹15k FIRST handle in a OPPO store. It's all good and few of the troubles you specified are easy to solve with current update and some others than you raised with the apps they specified in Galaxy store.