You are complaining about a 2% error. It’s well within the scope’s specification.
In general, a scope with an 8bit ADC will not make up to the precision of a 3.5 digit multimeter. Use the scope what’s it’s made for - waveform analysis.
I would not totally dissuade the OP from using a 'scope to look at DC, as it can be convenient when troubleshooting to just probe power rails to see if they are "round about" the right voltage.
I don't have a DSO, but have used an analog 'scope for this for years.
If I want to find the actual DC voltage, I use a Fluke.
Something I have done many times is to measure a supply rail with a Fluke, then whilst probing the same voltage, setting my CRO to "vert uncalibrated", & adjusting the display to a convenient scale more closely resembling the measured voltage.
Analog 'scopes have poor calibrated accuracy, but their "reset accuracy" is good so I can easily determine smaller variations than those visible in the calibrated position.
Of course, most people with DSOs hate "counting squares" & will simply take the readout as gospel.