What went wrong?

Guys i little help please.
http://www.dotabuff.com/matches/1061166619
can you please tell what went wrong?
A little critique on my gameplay is heavily appreciated.

I was Lone Druid all game we had the advantage but somehow we lost and i blame myself.
I think last minute roshan costed us very dearly but any insight is useful. So please do watch the replay if possible.

also this match,
http://www.dotabuff.com/matches/1061341504
built radiance, we won but i need any advice i can get.

Haven't watched the replay(probably won't) but it's probably because all five of their heroes could carry to a degree. Especially in a 75 minute game, you can see 5 carry teams come out of nowhere and start dominating when the game goes late. Doesn't help you only had a single carry, and then a semi carry NS.

I fast-forwarded the first game but to basically summarize it, you guys could've won if you all pushed and started teamfighting together more or at least have the LD split-push while the other 4 ganked. Maintain the pressure and you would've won. However, that didn't happen so the game took too long, their Heroes got fat and the Radiant easily pushed back.

simple
based on statistic overwiew(when u using LD) i can tell that u'r team have an advantage early in a game and guess no 1 want to push tower so the game turn out late and that'll happen team with more carry will winning
i can tell in KD ratio
winning team has bad KD ratio than the loosing one

How many pings did you make for that tier3 tower?

M just saying you needed to group up. But that night stalker being caught solo was a detriment to your team.

Also they had an intelligent necrophos. He saved his ulti fir you so you were unable to buy back.

You had a window of opening, rather 2 of them which you turned a blind eye on.

Counter radiance with radiance that's my moto.

Does anyone have some advice on improving lone druid?
especially with respect to my style if you have seen the game?