You appear to have many misconceptions about Christian doctrine. Let me address them one at a time.
First of all, God did do everything possible to avoid having people go to Hell.
Second, God cannot forgive sins effortlessly. It took Him quite a bit of effort to do so.
Thirdly, God has chosen to forgive all people. Some people are not reconciled to God because they chose to reject His forgiveness. A grant of forgiveness requires the agreement of the grantee, just like anything else. If you grant me five thousand bucks and I respond by ripping up your check, there’s nothing you can do to force me to accept the grant.
Fourthly, God does not send people to Hell. People choose to be sinners. God’s grace provides the means to reach Heaven and thereby avoid Hell.
Again, completely incorrect. Satan resists God throughout the Bible, through almost the end of Revelations. Satan cannot defeat God, but can certainly resist the will of God. There’s no reason to believe that Satan had to obey the “away from me!” command, rather Satan realized that tempting Jesus was a lost cause so he gave it up.
God did not make Hell.
(I’m not sure whether the major churches have an explanation for who made Hell. The only explanation I’ve heard comes from John Milton, who’s basic theory as this. God gave Satan & Co. the boot from Heaven, they went crashing downwards and landed at the bottom of primordial chaos and decided to found Hell there.)
Yes, of course there are. It’s just a hell (ahem) of a lot easier with Jesus.