“…and people getting more lenient sentences when they are convicted of more serious crimes such as burglary!”
No they don’t. Very few perpetrators of domestic burglary avoid a custodial sentence. Only if the offence is at the very lowest end of seriousness (e.g. premises unoccupied, minimal or no damage, low value of goods stolen) would custody be avoided. The “range” of sentences for category 3 (least serious) offences goes up to 26 weeks custody. For category one offences sentences of up to six years are considered.
This particular offence was obviously viewed as a “Category One” assault. This is unsurprising. It was the deliberate targeting of a vulnerable victim committed whilst the defendant was drunk. It was totally unnecessary and unprovoked and involved deliberate degradation. I believe the District Judge was extremely lenient.