Ignoring the fact that it's ugly as sin and they bundle hundreds of useless apps which are cannot be removed which can cause weird breakages when disabled, the problem is that despite the fact that on paper their hardware should crush every other phone on the market they somehow manage to make the phones UI slower than a budget phone running stock (or near stock) Android.
To be fair, that hardware shines when Android fades away and you want to play graphically intensive phone games but it's terrible for everything else.
To be fair, that hardware shines when Android fades away and you want to play graphically intensive phone games but it's terrible for everything else.