He was endorsed by the dropouts because any political operative could see that Biden was the best candidate to beat trump. Sanders core support is from white liberals and there aren’t enough of them to win a presidential election. Minorites and moderates have no interest in him and that was shown in the primary results.

Sanders would have been stomped by trump on 2016 or 2020

Biden won the most states, nothing was sabotaged.

Not sure how you could not be the asshole in that scenario.

If you’re sitting down at a table having a meal with a waiter who is taking your order and bringing you your food then yes, 15-20% tip is strongly encouraged. If you’re going into a place where you order your food at a counter and pick it up yourself to take to your table or back to your home then tipping is not necessary.