Canada

Objectively, no it isn't.

The best thing an individual can do for the climate crisis is switch their home heating to an electric heat pump powered by renewable energy sources, in combination with better insulation and increasing the density of their housing (apartments require less heat/cooling per person than townhouses, which use less energy per person than detached houses)

Home heating/cooling is the single largest source of emissions for an individual (on average) in developed countries.

It sounds like you already eliminated or significantly reduced the personal car, which is the second highest average individual source.

The emissions from the food you eat is usually the third largest individual source.

100% Veganism globally would be expected to drop global emissions by about 17%, but even switching to just replacing 75% of red meat with other meats would still drop global emissions by 10%, and full vegetarianism (no meat) would drop it by 14%. Veganism is definitely the most reduction, but it's not necessary at all if we just reduce the red meat and fix some of larger heating/cooling and transportation issues.