...it is not first time. He has no sense of urgency and although 8mins is not horribly long, what angers me is attitude.
He says if he wouldnt vacuum the car - theI would be angry.
If you have ever received a lift from H or any other favour and in response you have taken him to task for not doing something else that was on the agenda, then YABU and your H has a point.
If this has never happened, or if H tends to save up chores that he has agreed to do until you need him to do something else, and he then withdraws the chore from the vault so that he has some passive aggressive reason to be late, then I agree with Iggly.
Who takes a detour to vacuum a car on their way to pick up a spouse on a really hot day (the hottest ever) when they know the spouse has been stuck on trains for hours?
Who chooses the hottest day ever to vacuum a car even...
YANBU, if your H does this all the time, but don't just fume and let this ruin your weekend.
Plan to tackle your H on this at a later date. Try to destress and cool down first.
Distance yourself from the 'heat of the moment' and then tell him the two of you need to talk about how you feel when he lets you down. Maybe write him a letter - "When you do X I feel Y..."