Not everyone disliked TPM, but those who did all have their own reasons for why they think it was poorly made.
For me I think GWL has introduced too many new characters, and I think he has gone overboard with special effects. It is also missing some classic Star Wars elements such as the lightspeed effect from inside the cockpit and C-3PO's golden coverings. Just little things like that would tie it in with the clasic trilogy and please many Star Wars fans.
What are your reasons for disliking Episode I?