I (20m) play DnD once a week with a group of 8 people and our DM (30m). A couple of sessions ago, we were offered a chance to buy steeds to move around more quickly. Most of the party decided to buy one, but I held out alongside another member of our party. I didn't see the need to spend what little gold we all had on a steed when the DM had specifically stated that he would never make us lose a quest because we took too long to get there. So the other party member and I decided to continue on foot. Fast forward to last week's session, and we got another opportunity to buy steeds. I hadn't changed my mind, but the only other member who didn't have one did. She bought one, leaving me being the only holdout. My party kept trying to convince me to buy one, but I kept my resolve. That is, until my DM asked to see me in another room. We left the room, and he tried to convince me to change my mind. During this conversation, he said that he would end my character if I didn't cave. Now, my DM is a guy who likes to joke around a lot, so I wasn't 100% sure if that was a joke, or if he meant it. He even said that being the only person holding out makes me an asshole. I decided to cave in, because I really don't want him to end my character. But it really doesn't sit well with me that my DM threatened to end my character. I am relatively new to DnD, this being my first campaign, so I don't really know all the etiquette of the game. So am I the asshole?
TLDR; I refused to buy a steed, which caused my DM to threaten to end my character.