Roku keeps disconnecting from wifi

My Express 4K+ has been having this problem from the start. It started disconnecting from the WiFi about once or twice a week. After about 9 months, it started disconnecting daily. Now, after having it a year, it will disconnect what seems like hourly. I am able to reconnect after I power it down and restart the whole system or unplug it for half a day. This is getting very frustrating and I wished I would have returned it or got an Amazon fire stick in its place instead if this is the only kind of quality this is going to be. I love the microphone in the remote feature. That is sweet but the batteries in the remote constantly have to be replaced for some reason. It's very low quality support and equipment and this is very frustrating. I have done all the troubleshooting steps and even gone out of my way and replaced my modem and my router. Still having the same issue. I have an old Roku in my bedroom which is never failed me. It's just the simple basic run of the mill Roku. It seems like every time they try to advance or make something fancy, it just makes it worthless. I like the advantage of being able to have this remote control reach across the room without even having to point at the the Roku itself. I love the features and the options at Roku has but to me it's almost not even worth it getting the upgraded systems if this is the only kind of quality they have!