I did research for one semester at my home institution but wasn't any good at it, and found it to be so incredibly dull and time-consuming. This lasted for about 8 months, and I quit to prioritize my academics. I am a Senior now, and the chances that I will get research experience for the summer is practically null as I am in a public university. I cannot count on getting a letter of recommendation as my PI was quite angry that I left (he doesn't acknowledge me when we see each other). Should I bother mentioning that I have this experience? Will it be worse if I don't have a letter of recommendation?