These are basically the things that happened in the episode.
1. SS Vegeta fired a Big Bang Attack which was casually slapped away.
2. A stray Ki blast from Anilaza was blocked by Jiren.
3. Anilaza overpowered Post-2nd UIS SSG Goku with a Warp punch after Goku caught his fist.
4. Base Frieza countered a single blast from Anilaza.
5. Anilaza fired off multiple small Ki blast which were blocked by SS Vegeta, Android 18, Gohan, and Base Frieza.
6. He pushed back Android 17 who was using his barriers to block the energy blast.
7. After growing wings his energy ball was overpowering Post-2nd UIS SSB Goku, SSB Vegeta, Golden Frieza, Ultimate Gohan, and Android 17 at the same time.
The only time Anilaza was overpowered was after his energy reactor was damaged by 17's barrier punch. So at the very least shouldn't Anilaza be Low 2-C with his maximum output?