My first FPGA was a cheap Lattice kit and I never fully wrapped my head around their toolchain (Diamond). It has everything you need but the workflow and UI made it hard for me as a beginner. I also found the documentation and tutorials to be lacking.

Later, I started using an Altera FPGA for my hobby projects and I'm much happier with their software. I am beginning a research project using Xilinx (ISE) now. I'm not sure if its better than Quartus, but its better than Diamond.