Group Messaging never ending torment.

Hi. I despise the stock messaging app on my H810 Att LG G4. Sometimes I will get anonymous messages with nothing to download. Other times I will be prompted to retry to download an MMS over and over. I feel I am missing out on texts from my friends and family. I checked APN settings, called ATT, and even had a replacement phone shipped. I have tried multiple 3rd party apps. Textra intermittently works, but I constantly get a notification to "Cant retrieve MMS recheck APN settings". Group message has people with iphones and other carreirs, but I can't believe a basic functionality is so buggy. Do any of you have any tips to solve this issue.?