I see a lot of Finn hate.. and I disagree with it
Finn is a good guy. He has a good heart, he’s fun, funny, he’s loving and so thoughtful with the girls he’s with (I mean - he went out of his way to make sure his girlfriend could take a spacewalk because she got rejected on the test - and then took the fall when it turned badly - what a sweetheart!!!!).
After the village slaughter, he had the chance to murder another grounder and he didn’t - he let him run away.
I really do not see any “bad” or “crazy” in Finn. He went through a scenario most of us could never fathom - losing the person you love and truly not knowing if they are alive or dead, hoping they are alive and searching for any proof of it. From a third-party perspective, he found the people who had Clarke’s dad’s watch and their peoples’ clothes. I would not be so forgiving in that moment either. The proof he was looking for was all there.
I wanted Clarke and Finn to end up together. RIP Finn.