Maybe you don't. We're not discussing your perception.Ubuntu version and SSD brand? I have Ubuntu both on an i3 5005U and a R3 1200, I can't see any difference when comparing them on normal/office use.
We *know* 200GE is slow in single-thread stuff. This is what benchmarks are for.
We know it performs more or less like a desktop 1st/2nd-gen Intel Core (or 4th/5th mobile Core).
That was a long time ago.
It doesn't mean the CPU is unusable.
But with a slow single-thread CPU, everything takes a little longer. The overall experience is that the PC gets a bit more laggy and less comfortable.
No one says you can't use a 200GE for casual computing. And if you're used to this kind of performance, you may not even see it as a problem. But many people will.
At the end of the day, people even use Atom-based tablets for basic stuff we're talking about (browsing, Ms Office, watching movies etc). I do as well.
My Atom x5 is maybe half as fast as 200GE in single-thread in best case scenario. Is using it comfortable? No. But knowing this limitations, can I accept it? Of course I can. I even use it for SAS, R and Visual Studio. I bought it because I wanted that particular size and battery life. And getting something faster meant spending 3x more (e.g. Surface Pro).
Do people buying CPUs understand these limitations? Most don't. For them a PC will simply be less responsive than what they may be used to (even in their phones).
And getting a Pentium G in this case, while adding a few dozen $ to the price, is relatively how much? 10%?