Terrible Glitch inhibiting ability to play at all

Hello and thank you for your time. For a few weeks now, Minecraft gameplay has been extraordinarily glitchy and “laggy.” It seems to be intermittent, but the moment it starts, it’s impossible t Hello and thank you for your time. For a few weeks now, Minecraft gameplay has been extraordinarily glitchy and “laggy.” It seems to be intermittent, but the moment it starts, it’s impossible to play at allplay at all. Examples: character involuntarily swings action hand around whether holding anything or not (not good for going too the nether lol), can’t move character in any direction sometimes, or only moves in direction other times, blocks I break disappear and don’t show the drop for a significant amount of time, sometimes it’s like my whole screen is going bananas. Please help!!! I. Love. Bananas.....just not thiss kind😞