Do people really not know the proper way to report bugs?
Help > Contact > Report Bug. Or use https://www.warzone.com/ReportBug
If your computer is generally slow, it might be worth switching from HHD to SSD, upgrading RAM if you have less than 8GB (16GB for games) or upgrading graphics card.
If using a HHD, the disk could be fragmented, idk how to defrag on Unix.
Could also be slow due to malware - preform an antivirus scan, no device is safe because the user is how they got there in the first place.
You could try switching browser. Warzone recommends you play using Firefox for faster loading time (literally says this in the loading screen).