Dedicated and Virtual Private Servers (VPS) are always betteer choices over Shared Hosting when you look for speed and reliablility.
Many hosting provider offer dedicated servers, only a few offers managed hosting support.
For example, if you go directly with dedicated servers like Amazon (AWS), Google Cloud or DigitalOcean, expect to do some heavy work yourself. You need to set up hosting environment manually or install CPanel.
Besides that, you also manage and maintain the day by day operation of your server. If you are not experienced and have no relevant skills for such tasks, you can expect headaches whenever there are problems, slow speed or downtime.