Not for OP.
I usually use Adminer instead of phpMyAdmin.
Adminer (formerly phpMinAdmin) is a full-featured database management tool written in PHP. Conversely to phpMyAdmin, it consist of a single file ready to deploy to the target server. Adminer is available for MySQL, MariaDB, PostgreSQL, SQLite, MS SQL, Oracle, Elasticsearch, MongoDB and others via plugin
Look into Bufferbloat and SQM.
One way is to replace your router with a router with good SQM (smart queue management). You can find recommended router at https://www.waveform.com/tools/bufferbloat