Regarding FPC based IDEs, Lazarus has the most advanced available installation process:
- has official downloads from the interned web site;
- has 3rd party installation processes based on package managers(linux);
- has 3rd party installation processes(getlazarus and fpcup come into my mind).
Is your problem related to the fact that the installation processes depend on too many 3rd party items(programs, libraries and so on)?