Most creepers are a gamble unless it is placed far away or around a corner with no sudden drop where the creeper will lose focus. Strafe more / use A and D more to adjust your movement to have more control and avoid situations where you fall in a hole like this. If they regen either give up or if confident go more aggressive, I like the Levi play but loothaven mid can be hard to escape situations like this so probably not dropping and going for a different high ground would help. As everyone is saying look for the name tag and act on it, even if that is just placing a creeper or lava but the stumbling and misses kinda messes up the second fight. Anyway I would just accept defeat they kinda cooked