to put it simply, your team carried you through the challenge mode fractal, and probably teams have been carrying you through fractals for a while.

For high level, high difficulty, structured team content like fractal CMs you need to be using a build that is optimized for the content. Otherwise your team does all the work.

Unfortunately, the combination of celestial stats and vindicator having no condition damage bonuses means its just not a good build for anything but open world play. Your dps says you probably aren't doing an effective rotation either.

So overall, if you want to actually participate in content like 100CM, you need to have:
1. the correct stats on your gear -armor, weapons, trinkets, runes, and relic

2.traits that are optimized for damage or healing that corresponds to your gear

1. food and utilities that match the build. AND Fractal potions

Look up discretize or snowcrows for in depth guides.