First the holy water was exchanged for hand sanitizer.
No idea what is happening here. Obviously hand sanitizer can't substitute for holy water. My guess would be that, for whatever reason, the pastor removed the holy water and when setting up hand sanitizer units simply put them where the holy water used to be. There's nothing wrong with placing hand sanitizer at the entrance ways of the church but there should also be holy water.
he completely skipped the Penitential rite, not even a Lord Have Mercy.
The only exception to using the Penitential Rite would be if the Sprinkling Rite was used instead (GIRM 51). After sprinkling the congregation the priest would say, "May almighty God have mercy on us..."
he went straight to Prayers of the faithful after his homily
The Creed is not optional on Christmas, it should have been recited.
he combined two different Eucharistic prayers, seemingly adlibbing
Celebrants are not permitted to "cut and paste" the Eucharistic Prayers. However there are several options for Eucharistic Prayers.
the bread was leavened.
Leavened bread in the Roman Rite, while illicit, does not invalidate the Eucharist. The Eastern Churches use leavened bread. However in the Roman Rite unleavened bread is what the rubrics call for and what should be used.
This is just a good reminder that the liturgy is not something to be experimented with or the place to "try something out." Celebrants who do such thing confuse the faithful and distract from worship.