I am sorry to notice, you have such a bad experience with lazarus.
You didn't mention your system specifics, so I tried on windows with fpc 1.0.
I tried the following on lazarus-win32 with fpc 1.0.10.
Craete a new project, application type.
Add a Treeview on a Form.
Delete it.
Lazarus continues to be.
Then I readded the treeview and closed the From.
Again no access violation.
Can you help to reproduce your errors? Then I can try to fix them.
Vincent.