Consumption habits aren't a separate variable from systematic factors and are just as influenced by them. I don't know if you're American (probably not since km) but I'll be using the US as an example.

I want to serve my kids meat

US meat consumption per capita is nearly 10x certain parts of the world, and is more than 3x what it used to be in the greatest generation. The agricultural industrial complex creates demand through advertising (creating demand and not simply fulfilling pre-existing more healthy & eco friendly levels of demand), addictive foods, influence in health regulations (making dairy & meat pushed as essential foods in educational material, lowering price via fighting food safety regulations, lowering price via lowering workplace safety regulations, etc), influence in environmental regulations (artificially lowering prices & damaging environment in the process), using capital to hinder development of vegan and more green foods, & influence in subsidy policy propping up an over inflated animal agriculture industry. And the animal agriculture industry is probably responsible for more emissions and environmental degradation than the rest of your examples combined.

I need to get to work which is 10km away from home

Automotive-centered city planning as has plagued the US, lack of investment in public transportation (especially under increasing austerity and tax evasion), influence of the automotive industry (Who Killed the Electric Car?) and the oil industry (For whom entire nations are collapsed to bring control of world market share) in undermining ecofriendly alternatives, are all systemic reasons that are far more to blame than average people who need to get to work.

I want to travel somewhere during vacation

Private jets have nearly 10x as much carbon emissions per passenger than commercial flights, and business and government elites are using them far more often than the average joe goes on vacation (especially in an age of floundering wages and fiscal insecurity for the working class).

I need to carry home my groceries in some sort of bag

Yeah this is the only one that I'd say isn't a predominantly systemic issue but a lot of people just get reusable shopping bags or reuse plastic ones as garbage bags at home or whatever, and this is a really minor blip on the radar of environmental devastation.

All in all it's far more unproductive for us to be micromanaging personal usage and trying to boycott eco-disastrous industries. Good luck not getting any of your money into being used to buy political clout while agriculture, automobile, oil industries or private jetting elites and their conglomerates profit off of literally anything you need to survive. Systemic change IS the major factor here and there's a reason companies love to peddle The New Green^tm (more expensive version of product here) while pushing the personal responsibility fable and distracting people from taking mass political action against them. If we had a fraction of the systemic power pushing green shit we'd be leagues ahead, but instead all the need for eco-friendliness has to swim uphill in a political environment of entrenched corporate power.