The next time you end up taking a long rest you're just gonna find yourself falling into a sinkhole and landing in the middle of the fucking underdark.

Why are they resting with bugbears?

Three bears? Where did the bugs go? (checks notes)
/s

On their int the bears stand up, put on hats, pull out canes, and dance off stage left

5 level 3+ characters vs 3 CR 1 bugbears and a handful of CR 1/4 goblins.

That is a trivial encounter. Of course you wrecked them.

If I were a player in this game I actually would be worried. The DM doesn't seem to have a clue how to make a balanced encounter and after this is likely to just look up random Monster Manual entries of a CR six levels higher than the party or throw so many weak ones at the party that the action economy makes it impossible to survive.

One of my first times as a DM, I had the gang walking through a desert and wind up at an oasis.

They had their first mini boss there, a bunch on angry, hungry talon and fang equipped ostriches.

I'm getting ready to kick their ass as they were mine, and 1 of the guys pulls out 6!!!! Loaves of bread and starts feeding the fuckers.

No-one was happy with him.....

Give 'em hobgoblins; if I recall correctly, those guys have like 18 ac and teamwork abilities. They're also really low CR; my brother's party faced a group of them and could barely hit them. Cheap for sure, but a guaranteed difficult encounter.